forked from Mirrors/openclonk
1817 lines
50 KiB
C++
1817 lines
50 KiB
C++
/*
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* OpenClonk, http://www.openclonk.org
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*
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* Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
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* Copyright (c) 2009-2016, The OpenClonk Team and contributors
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*
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* Distributed under the terms of the ISC license; see accompanying file
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* "COPYING" for details.
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*
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* "Clonk" is a registered trademark of Matthes Bender, used with permission.
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* See accompanying file "TRADEMARK" for details.
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*
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* To redistribute this file separately, substitute the full license texts
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* for the above references.
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*/
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// parses scripts
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#include "C4Include.h"
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#include "script/C4AulParse.h"
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#include "object/C4Def.h"
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#include "script/C4AulDebug.h"
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#include "script/C4AulExec.h"
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#ifndef DEBUG_BYTECODE_DUMP
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#define DEBUG_BYTECODE_DUMP 0
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#endif
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#include <iomanip>
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#define C4AUL_Include "#include"
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#define C4AUL_Append "#appendto"
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#define C4AUL_Warning "#warning"
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#define C4Aul_Warning_enable "enable"
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#define C4Aul_Warning_disable "disable"
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#define C4AUL_Func "func"
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#define C4AUL_Private "private"
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#define C4AUL_Protected "protected"
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#define C4AUL_Public "public"
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#define C4AUL_Global "global"
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#define C4AUL_Const "const"
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#define C4AUL_If "if"
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#define C4AUL_Else "else"
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#define C4AUL_Do "do"
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#define C4AUL_While "while"
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#define C4AUL_For "for"
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#define C4AUL_In "in"
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#define C4AUL_Return "return"
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#define C4AUL_Var "Var"
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#define C4AUL_Par "Par"
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#define C4AUL_Break "break"
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#define C4AUL_Continue "continue"
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#define C4AUL_this "this"
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#define C4AUL_GlobalNamed "static"
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#define C4AUL_LocalNamed "local"
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#define C4AUL_VarNamed "var"
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#define C4AUL_TypeInt "int"
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#define C4AUL_TypeBool "bool"
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#define C4AUL_TypeC4ID "id"
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#define C4AUL_TypeDef "def"
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#define C4AUL_TypeEffect "effect"
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#define C4AUL_TypeC4Object "object"
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#define C4AUL_TypePropList "proplist"
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#define C4AUL_TypeString "string"
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#define C4AUL_TypeArray "array"
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#define C4AUL_TypeFunction "func"
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#define C4AUL_True "true"
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#define C4AUL_False "false"
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#define C4AUL_Nil "nil"
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#define C4AUL_New "new"
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// script token type
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enum C4AulTokenType : int
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{
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ATT_INVALID,// invalid token
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ATT_DIR, // directive
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ATT_IDTF, // identifier
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ATT_INT, // integer constant
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ATT_STRING, // string constant
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ATT_DOT, // "."
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ATT_COMMA, // ","
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ATT_COLON, // ":"
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ATT_SCOLON, // ";"
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ATT_BOPEN, // "("
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ATT_BCLOSE, // ")"
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ATT_BOPEN2, // "["
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ATT_BCLOSE2,// "]"
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ATT_BLOPEN, // "{"
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ATT_BLCLOSE,// "}"
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ATT_CALL, // "->"
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ATT_CALLFS, // "->~"
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ATT_LDOTS, // '...'
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ATT_SET, // '='
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ATT_OPERATOR,// operator
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ATT_EOF // end of file
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};
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C4AulParse::C4AulParse(C4ScriptHost *a) :
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Fn(nullptr), Host(a), pOrgScript(a), Engine(a->Engine),
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SPos(a->Script.getData()), TokenSPos(SPos),
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TokenType(ATT_INVALID),
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ContextToExecIn(nullptr)
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{ }
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C4AulParse::C4AulParse(C4AulScriptFunc * Fn, C4AulScriptContext* context, C4AulScriptEngine *Engine) :
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Fn(Fn), Host(nullptr), pOrgScript(nullptr), Engine(Engine),
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SPos(Fn->Script), TokenSPos(SPos),
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TokenType(ATT_INVALID),
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ContextToExecIn(context)
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{ }
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C4AulParse::~C4AulParse()
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{
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ClearToken();
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}
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void C4ScriptHost::Warn(const char *pMsg, ...)
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{
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va_list args; va_start(args, pMsg);
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StdStrBuf Buf = FormatStringV(pMsg, args);
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Buf.AppendFormat(" (%s)", ScriptName.getData());
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Engine->GetErrorHandler()->OnWarning(Buf.getData());
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va_end(args);
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}
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void C4AulParse::Warn(C4AulWarningId warning, ...)
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{
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if (!pOrgScript->IsWarningEnabled(TokenSPos, warning))
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return;
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va_list args; va_start(args, warning);
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StdStrBuf Buf = FormatStringV(C4AulWarningMessages[static_cast<size_t>(warning)], args);
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AppendPosition(Buf);
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Buf.AppendFormat(" [%s]", C4AulWarningIDs[static_cast<size_t>(warning)]);
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Engine->GetErrorHandler()->OnWarning(Buf.getData());
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va_end(args);
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}
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void C4AulParse::Error(const char *pMsg, ...)
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{
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va_list args; va_start(args, pMsg);
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StdStrBuf Buf;
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Buf.FormatV(pMsg, args);
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throw C4AulParseError(this, Buf.getData());
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}
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void C4AulParse::AppendPosition(StdStrBuf & Buf)
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{
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if (Fn && Fn->GetName())
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{
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// Show function name
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Buf.AppendFormat(" (in %s", Fn->GetName());
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// Exact position
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if (Fn->pOrgScript && TokenSPos)
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Buf.AppendFormat(", %s:%d:%d)",
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Fn->pOrgScript->ScriptName.getData(),
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SGetLine(Fn->pOrgScript->GetScript(), TokenSPos),
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SLineGetCharacters(Fn->pOrgScript->GetScript(), TokenSPos));
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else
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Buf.AppendChar(')');
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}
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else if (pOrgScript)
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{
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// Script name
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Buf.AppendFormat(" (%s:%d:%d)",
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pOrgScript->ScriptName.getData(),
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SGetLine(pOrgScript->GetScript(), TokenSPos),
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SLineGetCharacters(pOrgScript->GetScript(), TokenSPos));
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}
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// show a warning if the error is in a remote script
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if (pOrgScript != Host && Host)
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Buf.AppendFormat(" (as #appendto/#include to %s)", Host->ScriptName.getData());
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}
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C4AulParseError::C4AulParseError(C4AulParse * state, const char *pMsg)
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{
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// compose error string
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sMessage.Copy(pMsg);
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state->AppendPosition(sMessage);
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}
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C4AulParseError::C4AulParseError(C4ScriptHost *pScript, const char *pMsg)
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{
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// compose error string
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sMessage.Copy(pMsg);
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if (pScript)
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{
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// Script name
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sMessage.AppendFormat(" (%s)",
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pScript->ScriptName.getData());
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}
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}
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C4AulParseError::C4AulParseError(C4AulScriptFunc * Fn, const char *SPos, const char *pMsg)
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{
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// compose error string
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sMessage.Copy(pMsg);
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if (!Fn) return;
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sMessage.Append(" (");
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// Show function name
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if (Fn->GetName())
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sMessage.AppendFormat("in %s", Fn->GetName());
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if (Fn->GetName() && Fn->pOrgScript && SPos)
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sMessage.Append(", ");
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// Exact position
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if (Fn->pOrgScript && SPos)
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sMessage.AppendFormat("%s:%d:%d)",
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Fn->pOrgScript->ScriptName.getData(),
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SGetLine(Fn->pOrgScript->GetScript(), SPos),
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SLineGetCharacters(Fn->pOrgScript->GetScript(), SPos));
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else
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sMessage.AppendChar(')');
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}
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bool C4AulParse::AdvanceSpaces()
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{
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if (!SPos)
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return false;
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while(*SPos)
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{
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if (*SPos == '/')
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{
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// // comment
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if (SPos[1] == '/')
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{
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SPos += 2;
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while (*SPos && *SPos != 13 && *SPos != 10)
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++SPos;
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}
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// /* comment */
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else if (SPos[1] == '*')
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{
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SPos += 2;
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while (*SPos && (*SPos != '*' || SPos[1] != '/'))
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++SPos;
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SPos += 2;
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}
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else
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return true;
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}
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// Skip any "zero width no-break spaces" (also known as Byte Order Marks)
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else if (*SPos == '\xEF' && SPos[1] == '\xBB' && SPos[2] == '\xBF')
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SPos += 3;
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else if ((unsigned)*SPos > 32)
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return true;
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else
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++SPos;
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}
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// end of script reached
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return false;
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}
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//=========================== C4Script Operator Map ===================================
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const C4ScriptOpDef C4ScriptOpMap[] =
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{
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// priority postfix
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// | identifier | changer
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// | | Bytecode | | no second id
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// | | | | | | RetType ParType1 ParType2
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// prefix
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{ 15, "++", AB_Inc, false, true, false, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "--", AB_Dec, false, true, false, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "~", AB_BitNot, false, false, false, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "!", AB_Not, false, false, false, C4V_Bool, C4V_Bool, C4V_Any},
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{ 15, "+", AB_ERR, false, false, false, C4V_Int, C4V_Int, C4V_Any},
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{ 15, "-", AB_Neg, false, false, false, C4V_Int, C4V_Int, C4V_Any},
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// postfix (whithout second statement)
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{ 16, "++", AB_Inc, true, true, true, C4V_Int, C4V_Int, C4V_Any},
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{ 16, "--", AB_Dec, true, true, true, C4V_Int, C4V_Int, C4V_Any},
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// postfix
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{ 14, "**", AB_Pow, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "/", AB_Div, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "*", AB_Mul, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 13, "%", AB_Mod, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 12, "-", AB_Sub, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 12, "+", AB_Sum, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 11, "<<", AB_LeftShift, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 11, ">>", AB_RightShift, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 10, "<", AB_LessThan, true, false, false, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, "<=", AB_LessThanEqual, true, false, false, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, ">", AB_GreaterThan, true, false, false, C4V_Bool, C4V_Int, C4V_Int},
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{ 10, ">=", AB_GreaterThanEqual, true, false, false, C4V_Bool, C4V_Int, C4V_Int},
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{ 9, "==", AB_Equal, true, false, false, C4V_Bool, C4V_Any, C4V_Any},
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{ 9, "!=", AB_NotEqual, true, false, false, C4V_Bool, C4V_Any, C4V_Any},
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{ 8, "&", AB_BitAnd, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 6, "^", AB_BitXOr, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 6, "|", AB_BitOr, true, false, false, C4V_Int, C4V_Int, C4V_Int},
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{ 5, "&&", AB_JUMPAND, true, false, false, C4V_Bool, C4V_Bool, C4V_Bool},
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{ 4, "||", AB_JUMPOR, true, false, false, C4V_Bool, C4V_Bool, C4V_Bool},
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{ 3, "??", AB_JUMPNNIL, true, false, false, C4V_Any, C4V_Any, C4V_Any},
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// changers
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{ 2, "*=", AB_Mul, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "/=", AB_Div, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "%=", AB_Mod, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "+=", AB_Sum, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "-=", AB_Sub, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "&=", AB_BitAnd, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "|=", AB_BitOr, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 2, "^=", AB_BitXOr, true, true, false, C4V_Int, C4V_Int, C4V_Int},
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{ 0, nullptr, AB_ERR, false, false, false, C4V_Nil, C4V_Nil, C4V_Nil}
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};
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int C4AulParse::GetOperator(const char* pScript)
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{
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// return value:
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// >= 0: operator found. could be found in C4ScriptOfDef
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// -1: isn't an operator
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unsigned int i;
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if (!*pScript) return 0;
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// operators are not alphabetical
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if ((*pScript >= 'a' && *pScript <= 'z') ||
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(*pScript >= 'A' && *pScript <= 'Z'))
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{
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return -1;
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}
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// find the longest operator
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int len = 0; int maxfound = -1;
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for (i=0; C4ScriptOpMap[i].Identifier; i++)
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{
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if (SEqual2(pScript, C4ScriptOpMap[i].Identifier))
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{
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int oplen = SLen(C4ScriptOpMap[i].Identifier);
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if (oplen > len)
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{
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len = oplen;
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maxfound = i;
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}
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}
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}
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return maxfound;
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}
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void C4AulParse::ClearToken()
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{
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// if last token was a string, make sure its ref is deleted
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if (TokenType == ATT_STRING && cStr)
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{
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cStr->DecRef();
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TokenType = ATT_INVALID;
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}
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}
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C4AulTokenType C4AulParse::GetNextToken()
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{
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// clear mem of prev token
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ClearToken();
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// move to start of token
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if (!AdvanceSpaces()) return ATT_EOF;
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// store offset
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TokenSPos = SPos;
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// get char
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char C = *(SPos++);
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// Mostly sorted by frequency, except that tokens that have
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// other tokens as prefixes need to be checked for first.
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if (Inside(C, 'a', 'z') || Inside(C, 'A', 'Z') || C == '_' || C == '#')
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{
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// identifier or directive
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bool dir = C == '#';
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int Len = 1;
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C = *SPos;
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while (Inside(C, '0', '9') || Inside(C, 'a', 'z') || Inside(C, 'A', 'Z') || C == '_')
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{
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++Len;
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C = *(++SPos);
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}
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// Special case for #warning because we don't want to give it to the parser
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if (dir && SEqual2(TokenSPos, C4AUL_Warning))
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{
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// Look for end of line or end of file
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while (*SPos != '\n' && *SPos != '\0') ++SPos;
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Parse_WarningPragma();
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// And actually return the next token.
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return GetNextToken();
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}
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Len = std::min(Len, C4AUL_MAX_Identifier);
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SCopy(TokenSPos, Idtf, Len);
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return dir ? ATT_DIR : ATT_IDTF;
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}
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else if (C == '(') return ATT_BOPEN; // "("
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else if (C == ')') return ATT_BCLOSE; // ")"
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else if (C == ',') return ATT_COMMA; // ","
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else if (C == ';') return ATT_SCOLON; // ";"
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else if (Inside(C, '0', '9'))
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{
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// integer
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if (C == '0' && *SPos == 'x')
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{
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// hexadecimal
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cInt = StrToI32(SPos + 1, 16, &SPos);
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return ATT_INT;
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}
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else
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{
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// decimal
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cInt = StrToI32(TokenSPos, 10, &SPos);
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return ATT_INT;
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}
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}
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else if (C == '-' && *SPos == '>' && *(SPos + 1) == '~')
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{ SPos+=2; return ATT_CALLFS;}// "->~"
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else if (C == '-' && *SPos == '>')
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{ ++SPos; return ATT_CALL; } // "->"
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else if ((cInt = GetOperator(SPos - 1)) != -1)
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{
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SPos += SLen(C4ScriptOpMap[cInt].Identifier) - 1;
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return ATT_OPERATOR;
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}
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else if (C == '=') return ATT_SET; // "="
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else if (C == '{') return ATT_BLOPEN; // "{"
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else if (C == '}') return ATT_BLCLOSE;// "}"
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else if (C == '"')
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{
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// string
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std::string strbuf;
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strbuf.reserve(512); // assume most strings to be smaller than this
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// string end
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while (*SPos != '"')
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{
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C = *SPos;
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++SPos;
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if (C == '\\') // escape
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switch (*SPos)
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{
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case '"': ++SPos; strbuf.push_back('"'); break;
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case '\\': ++SPos; strbuf.push_back('\\'); break;
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case 'n': ++SPos; strbuf.push_back('\n'); break;
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case 't': ++SPos; strbuf.push_back('\t'); break;
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case 'x':
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{
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++SPos;
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// hexadecimal escape: \xAD.
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// First char must be a hexdigit
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if (!std::isxdigit(*SPos))
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{
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Warn(C4AulWarningId::invalid_hex_escape);
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strbuf.push_back('\\'); strbuf.push_back('x');
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|
}
|
|
else
|
|
{
|
|
char ch = 0;
|
|
while (std::isxdigit(*SPos))
|
|
{
|
|
ch *= 16;
|
|
if (*SPos >= '0' && *SPos <= '9')
|
|
ch += *SPos - '0';
|
|
else if (*SPos >= 'a' && *SPos <= 'f')
|
|
ch += *SPos - 'a' + 10;
|
|
else if (*SPos >= 'A' && *SPos <= 'F')
|
|
ch += *SPos - 'A' + 10;
|
|
++SPos;
|
|
};
|
|
strbuf.push_back(ch);
|
|
}
|
|
break;
|
|
}
|
|
case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7':
|
|
{
|
|
// Octal escape: \142
|
|
char ch = 0;
|
|
while (SPos[0] >= '0' && SPos[0] <= '7')
|
|
{
|
|
ch *= 8;
|
|
ch += *SPos++ -'0';
|
|
}
|
|
strbuf.push_back(ch);
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
// just insert "\"
|
|
strbuf.push_back('\\');
|
|
// show warning
|
|
Warn(C4AulWarningId::invalid_escape_sequence, *(SPos + 1));
|
|
}
|
|
}
|
|
else if (C == 0 || C == 10 || C == 13) // line break / feed
|
|
throw C4AulParseError(this, "string not closed");
|
|
else
|
|
// copy character
|
|
strbuf.push_back(C);
|
|
}
|
|
++SPos;
|
|
cStr = Strings.RegString(StdStrBuf(strbuf.data(),strbuf.size()));
|
|
// hold onto string, ClearToken will deref it
|
|
cStr->IncRef();
|
|
return ATT_STRING;
|
|
}
|
|
else if (C == '[') return ATT_BOPEN2; // "["
|
|
else if (C == ']') return ATT_BCLOSE2;// "]"
|
|
else if (C == '.' && *SPos == '.' && *(SPos + 1) == '.')
|
|
{ SPos+=2; return ATT_LDOTS; } // "..."
|
|
else if (C == '.') return ATT_DOT; // "."
|
|
else if (C == ':') return ATT_COLON; // ":"
|
|
else
|
|
{
|
|
// show appropriate error message
|
|
if (C >= '!' && C <= '~')
|
|
throw C4AulParseError(this, FormatString("unexpected character '%c' found", C).getData());
|
|
else
|
|
throw C4AulParseError(this, FormatString(R"(unexpected character \x%x found)", (int)(unsigned char) C).getData());
|
|
}
|
|
}
|
|
|
|
static const char * GetTTName(C4AulBCCType e)
|
|
{
|
|
switch (e)
|
|
{
|
|
case AB_ARRAYA: return "ARRAYA"; // array access
|
|
case AB_ARRAYA_SET: return "ARRAYA_SET"; // setter
|
|
case AB_PROP: return "PROP";
|
|
case AB_PROP_SET: return "PROP_SET";
|
|
case AB_ARRAY_SLICE: return "ARRAY_SLICE";
|
|
case AB_ARRAY_SLICE_SET: return "ARRAY_SLICE_SET";
|
|
case AB_STACK_SET: return "STACK_SET";
|
|
case AB_LOCALN: return "LOCALN"; // a named local
|
|
case AB_LOCALN_SET: return "LOCALN_SET";
|
|
case AB_GLOBALN: return "GLOBALN"; // a named global
|
|
case AB_GLOBALN_SET: return "GLOBALN_SET";
|
|
case AB_PAR: return "PAR"; // Par statement
|
|
case AB_THIS: return "THIS";
|
|
case AB_FUNC: return "FUNC"; // function
|
|
|
|
// prefix
|
|
case AB_Inc: return "Inc"; // ++
|
|
case AB_Dec: return "Dec"; // --
|
|
case AB_BitNot: return "BitNot"; // ~
|
|
case AB_Not: return "Not"; // !
|
|
case AB_Neg: return "Neg"; // -
|
|
|
|
// postfix
|
|
case AB_Pow: return "Pow"; // **
|
|
case AB_Div: return "Div"; // /
|
|
case AB_Mul: return "Mul"; // *
|
|
case AB_Mod: return "Mod"; // %
|
|
case AB_Sub: return "Sub"; // -
|
|
case AB_Sum: return "Sum"; // +
|
|
case AB_LeftShift: return "LeftShift"; // <<
|
|
case AB_RightShift: return "RightShift"; // >>
|
|
case AB_LessThan: return "LessThan"; // <
|
|
case AB_LessThanEqual: return "LessThanEqual"; // <=
|
|
case AB_GreaterThan: return "GreaterThan"; // >
|
|
case AB_GreaterThanEqual: return "GreaterThanEqual"; // >=
|
|
case AB_Equal: return "Equal"; // ==
|
|
case AB_NotEqual: return "NotEqual"; // !=
|
|
case AB_BitAnd: return "BitAnd"; // &
|
|
case AB_BitXOr: return "BitXOr"; // ^
|
|
case AB_BitOr: return "BitOr"; // |
|
|
|
|
case AB_CALL: return "CALL"; // direct object call
|
|
case AB_CALLFS: return "CALLFS"; // failsafe direct call
|
|
case AB_STACK: return "STACK"; // push nulls / pop
|
|
case AB_INT: return "INT"; // constant: int
|
|
case AB_BOOL: return "BOOL"; // constant: bool
|
|
case AB_STRING: return "STRING"; // constant: string
|
|
case AB_CPROPLIST: return "CPROPLIST"; // constant: proplist
|
|
case AB_CARRAY: return "CARRAY"; // constant: array
|
|
case AB_CFUNCTION: return "CFUNCTION"; // constant: function
|
|
case AB_NIL: return "NIL"; // constant: nil
|
|
case AB_NEW_ARRAY: return "NEW_ARRAY"; // semi-constant: array
|
|
case AB_DUP: return "DUP"; // duplicate value from stack
|
|
case AB_DUP_CONTEXT: return "AB_DUP_CONTEXT"; // duplicate value from stack of parent function
|
|
case AB_NEW_PROPLIST: return "NEW_PROPLIST"; // create a new proplist
|
|
case AB_POP_TO: return "POP_TO"; // initialization of named var
|
|
case AB_JUMP: return "JUMP"; // jump
|
|
case AB_JUMPAND: return "JUMPAND";
|
|
case AB_JUMPOR: return "JUMPOR";
|
|
case AB_JUMPNNIL: return "JUMPNNIL"; // nil-coalescing operator ("??")
|
|
case AB_CONDN: return "CONDN"; // conditional jump (negated, pops stack)
|
|
case AB_COND: return "COND"; // conditional jump (pops stack)
|
|
case AB_FOREACH_NEXT: return "FOREACH_NEXT"; // foreach: next element
|
|
case AB_RETURN: return "RETURN"; // return statement
|
|
case AB_ERR: return "ERR"; // parse error at this position
|
|
case AB_DEBUG: return "DEBUG"; // debug break
|
|
case AB_EOFN: return "EOFN"; // end of function
|
|
}
|
|
assert(false); return "UNKNOWN";
|
|
}
|
|
|
|
void C4AulScriptFunc::DumpByteCode()
|
|
{
|
|
if (DEBUG_BYTECODE_DUMP)
|
|
{
|
|
fprintf(stderr, "%s:\n", GetName());
|
|
std::map<C4AulBCC *, int> labels;
|
|
int labeln = 0;
|
|
for (auto & bcc: Code)
|
|
{
|
|
switch (bcc.bccType)
|
|
{
|
|
case AB_JUMP: case AB_JUMPAND: case AB_JUMPOR: case AB_JUMPNNIL: case AB_CONDN: case AB_COND:
|
|
labels[&bcc + bcc.Par.i] = ++labeln; break;
|
|
default: break;
|
|
}
|
|
}
|
|
for (auto & bcc: Code)
|
|
{
|
|
C4AulBCCType eType = bcc.bccType;
|
|
if (labels.find(&bcc) != labels.end())
|
|
fprintf(stderr, "%d:\n", labels[&bcc]);
|
|
fprintf(stderr, "\t%d\t%-20s", GetLineOfCode(&bcc), GetTTName(eType));
|
|
switch (eType)
|
|
{
|
|
case AB_FUNC:
|
|
fprintf(stderr, "\t%s\n", bcc.Par.f->GetFullName().getData()); break;
|
|
case AB_ERR:
|
|
if (bcc.Par.s)
|
|
case AB_CALL: case AB_CALLFS: case AB_LOCALN: case AB_LOCALN_SET: case AB_PROP: case AB_PROP_SET:
|
|
fprintf(stderr, "\t%s\n", bcc.Par.s->GetCStr()); break;
|
|
case AB_STRING:
|
|
{
|
|
const StdStrBuf &s = bcc.Par.s->GetData();
|
|
std::string es;
|
|
std::for_each(s.getData(), s.getData() + s.getLength(), [&es](char c) {
|
|
if (std::isgraph((unsigned char)c))
|
|
{
|
|
es += c;
|
|
}
|
|
else
|
|
{
|
|
switch (c)
|
|
{
|
|
case '\'': es.append(R"(\')"); break;
|
|
case '\"': es.append(R"(\")"); break;
|
|
case '\\': es.append(R"(\\)"); break;
|
|
case '\a': es.append(R"(\a)"); break;
|
|
case '\b': es.append(R"(\b)"); break;
|
|
case '\f': es.append(R"(\f)"); break;
|
|
case '\n': es.append(R"(\n)"); break;
|
|
case '\r': es.append(R"(\r)"); break;
|
|
case '\t': es.append(R"(\t)"); break;
|
|
case '\v': es.append(R"(\v)"); break;
|
|
default:
|
|
{
|
|
std::stringstream hex;
|
|
hex << R"(\x)" << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>((unsigned char)c);
|
|
es.append(hex.str());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
});
|
|
fprintf(stderr, "\t\"%s\"\n", es.c_str()); break;
|
|
}
|
|
case AB_DEBUG: case AB_NIL: case AB_RETURN:
|
|
case AB_PAR: case AB_THIS:
|
|
case AB_ARRAYA: case AB_ARRAYA_SET: case AB_ARRAY_SLICE: case AB_ARRAY_SLICE_SET:
|
|
case AB_EOFN:
|
|
assert(!bcc.Par.X); fprintf(stderr, "\n"); break;
|
|
case AB_CARRAY:
|
|
fprintf(stderr, "\t%s\n", C4VArray(bcc.Par.a).GetDataString().getData()); break;
|
|
case AB_CPROPLIST:
|
|
fprintf(stderr, "\t%s\n", C4VPropList(bcc.Par.p).GetDataString().getData()); break;
|
|
case AB_JUMP: case AB_JUMPAND: case AB_JUMPOR: case AB_JUMPNNIL: case AB_CONDN: case AB_COND:
|
|
fprintf(stderr, "\t% -d\n", labels[&bcc + bcc.Par.i]); break;
|
|
default:
|
|
fprintf(stderr, "\t% -d\n", bcc.Par.i); break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool C4ScriptHost::Preparse()
|
|
{
|
|
// handle easiest case first
|
|
if (State < ASS_NONE) return false;
|
|
|
|
// clear stuff
|
|
Includes.clear(); Appends.clear();
|
|
|
|
GetPropList()->C4PropList::Clear();
|
|
GetPropList()->SetProperty(P_Prototype, C4VPropList(Engine->GetPropList()));
|
|
LocalValues.Clear();
|
|
|
|
// Add any engine functions specific to this script
|
|
AddEngineFunctions();
|
|
|
|
// Insert default warnings
|
|
assert(enabledWarnings.empty());
|
|
auto &warnings = enabledWarnings[Script.getData()];
|
|
#define DIAG(id, text, enabled) warnings.set(static_cast<size_t>(C4AulWarningId::id), enabled);
|
|
#include "C4AulWarnings.h"
|
|
#undef DIAG
|
|
|
|
C4AulParse parser(this);
|
|
ast = parser.Parse_Script(this);
|
|
|
|
C4AulCompiler::Preparse(this, this, ast.get());
|
|
|
|
// #include will have to be resolved now...
|
|
IncludesResolved = false;
|
|
|
|
// Parse will write the properties back after the ones from included scripts
|
|
GetPropList()->Properties.Swap(&LocalValues);
|
|
|
|
// return success
|
|
this->State = ASS_PREPARSED;
|
|
return true;
|
|
}
|
|
|
|
static const char * GetTokenName(C4AulTokenType TokenType)
|
|
{
|
|
switch (TokenType)
|
|
{
|
|
case ATT_INVALID: return "invalid token";
|
|
case ATT_DIR: return "directive";
|
|
case ATT_IDTF: return "identifier";
|
|
case ATT_INT: return "integer constant";
|
|
case ATT_STRING: return "string constant";
|
|
case ATT_DOT: return "'.'";
|
|
case ATT_COMMA: return "','";
|
|
case ATT_COLON: return "':'";
|
|
case ATT_SCOLON: return "';'";
|
|
case ATT_BOPEN: return "'('";
|
|
case ATT_BCLOSE: return "')'";
|
|
case ATT_BOPEN2: return "'['";
|
|
case ATT_BCLOSE2: return "']'";
|
|
case ATT_BLOPEN: return "'{'";
|
|
case ATT_BLCLOSE: return "'}'";
|
|
case ATT_CALL: return "'->'";
|
|
case ATT_CALLFS: return "'->~'";
|
|
case ATT_LDOTS: return "'...'";
|
|
case ATT_SET: return "'='";
|
|
case ATT_OPERATOR: return "operator";
|
|
case ATT_EOF: return "end of file";
|
|
default: return "unrecognized token";
|
|
}
|
|
}
|
|
|
|
void C4AulParse::Shift()
|
|
{
|
|
TokenType = GetNextToken();
|
|
}
|
|
void C4AulParse::Check(C4AulTokenType RefTokenType, const char * Expected)
|
|
{
|
|
if (TokenType != RefTokenType)
|
|
UnexpectedToken(Expected ? Expected : GetTokenName(RefTokenType));
|
|
}
|
|
void C4AulParse::Match(C4AulTokenType RefTokenType, const char * Expected)
|
|
{
|
|
Check(RefTokenType, Expected);
|
|
Shift();
|
|
}
|
|
void C4AulParse::UnexpectedToken(const char * Expected)
|
|
{
|
|
throw C4AulParseError(this, FormatString("%s expected, but found %s", Expected, GetTokenName(TokenType)).getData());
|
|
}
|
|
|
|
void C4AulParse::Parse_WarningPragma()
|
|
{
|
|
assert(SEqual2(TokenSPos, C4AUL_Warning));
|
|
assert(std::isspace(TokenSPos[sizeof(C4AUL_Warning) - 1]));
|
|
|
|
|
|
// Read parameters in to string buffer. The sizeof() includes the terminating \0, but
|
|
// that's okay because we need to skip (at least) one whitespace character anyway.
|
|
std::string line(TokenSPos + sizeof(C4AUL_Warning), SPos);
|
|
auto end = line.end();
|
|
auto cursor = std::find_if_not(begin(line), end, IsWhiteSpace);
|
|
|
|
if (cursor == end)
|
|
throw C4AulParseError(this, "'" C4Aul_Warning_enable "' or '" C4Aul_Warning_disable "' expected, but found end of line");
|
|
|
|
// Split directive on whitespace
|
|
auto start = cursor;
|
|
cursor = std::find_if(start, end, IsWhiteSpace);
|
|
bool enable_warning = false;
|
|
if (std::equal(start, cursor, C4Aul_Warning_enable))
|
|
{
|
|
enable_warning = true;
|
|
}
|
|
else if (std::equal(start, cursor, C4Aul_Warning_disable))
|
|
{
|
|
enable_warning = false;
|
|
}
|
|
else
|
|
{
|
|
throw C4AulParseError(this, FormatString("'" C4Aul_Warning_enable "' or '" C4Aul_Warning_disable "' expected, but found '%s'", std::string(start, cursor).c_str()).getData());
|
|
}
|
|
|
|
cursor = std::find_if_not(cursor, end, IsWhiteSpace);
|
|
if (cursor == end)
|
|
{
|
|
// enable or disable all warnings
|
|
#define DIAG(id, text, enabled) pOrgScript->EnableWarning(TokenSPos, C4AulWarningId::id, enable_warning);
|
|
#include "C4AulWarnings.h"
|
|
#undef DIAG
|
|
return;
|
|
}
|
|
|
|
// enable or disable specific warnings
|
|
static const std::map<std::string, C4AulWarningId> warnings{
|
|
#define DIAG(id, text, enabled) std::make_pair(#id, C4AulWarningId::id),
|
|
#include "C4AulWarnings.h"
|
|
#undef DIAG
|
|
};
|
|
while (cursor != end)
|
|
{
|
|
start = std::find_if_not(cursor, end, IsWhiteSpace);
|
|
cursor = std::find_if(start, end, IsWhiteSpace);
|
|
auto entry = warnings.find(std::string(start, cursor));
|
|
if (entry != warnings.end())
|
|
{
|
|
pOrgScript->EnableWarning(TokenSPos, entry->second, enable_warning);
|
|
}
|
|
}
|
|
}
|
|
|
|
void C4AulScriptFunc::ParseDirectExecFunc(C4AulScriptEngine *Engine, C4AulScriptContext* context)
|
|
{
|
|
ClearCode();
|
|
// parse
|
|
C4AulParse state(this, context, Engine);
|
|
auto func = state.Parse_DirectExec(Script, true);
|
|
C4AulCompiler::Compile(this, func.get());
|
|
}
|
|
|
|
void C4AulScriptFunc::ParseDirectExecStatement(C4AulScriptEngine *Engine, C4AulScriptContext* context)
|
|
{
|
|
ClearCode();
|
|
// parse
|
|
C4AulParse state(this, context, Engine);
|
|
auto func = state.Parse_DirectExec(Script, false);
|
|
C4AulCompiler::Compile(this, func.get());
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::FunctionDecl> C4AulParse::Parse_DirectExec(const char *code, bool whole_function)
|
|
{
|
|
// get first token
|
|
Shift();
|
|
// Synthesize a wrapping function which we can call
|
|
std::unique_ptr<::aul::ast::FunctionDecl> func;
|
|
if (whole_function)
|
|
{
|
|
func = Parse_ToplevelFunctionDecl();
|
|
}
|
|
else
|
|
{
|
|
auto expr = Parse_Expression();
|
|
func = std::make_unique<::aul::ast::FunctionDecl>("$internal$eval");
|
|
func->body = std::make_unique<::aul::ast::Block>();
|
|
func->body->children.push_back(std::make_unique<::aul::ast::Return>(std::move(expr)));
|
|
}
|
|
Match(ATT_EOF);
|
|
return func;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::Script> C4AulParse::Parse_Script(C4ScriptHost * scripthost)
|
|
{
|
|
pOrgScript = scripthost;
|
|
SPos = pOrgScript->Script.getData();
|
|
const char * SPos0 = SPos;
|
|
bool first_error = true;
|
|
auto script = ::aul::ast::Script::New(SPos0);
|
|
while (true) try
|
|
{
|
|
// Go to the next token if the current token could not be processed or no token has yet been parsed
|
|
if (SPos == SPos0)
|
|
{
|
|
Shift();
|
|
}
|
|
SPos0 = SPos;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_DIR:
|
|
// check for include statement
|
|
if (SEqual(Idtf, C4AUL_Include))
|
|
{
|
|
Shift();
|
|
// get id of script to include
|
|
Check(ATT_IDTF, "script name");
|
|
script->declarations.push_back(::aul::ast::IncludePragma::New(TokenSPos, Idtf));
|
|
Shift();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Append))
|
|
{
|
|
if (pOrgScript->GetPropList()->GetDef())
|
|
throw C4AulParseError(this, "#appendto in a Definition");
|
|
Shift();
|
|
// get id of script to include/append
|
|
switch (TokenType)
|
|
{
|
|
case ATT_IDTF:
|
|
script->declarations.push_back(::aul::ast::AppendtoPragma::New(TokenSPos, Idtf));
|
|
break;
|
|
case ATT_OPERATOR:
|
|
if (SEqual(C4ScriptOpMap[cInt].Identifier, "*"))
|
|
{
|
|
script->declarations.push_back(::aul::ast::AppendtoPragma::New(TokenSPos));
|
|
break;
|
|
}
|
|
//fallthrough
|
|
default:
|
|
// -> ID expected
|
|
UnexpectedToken("identifier or '*'");
|
|
}
|
|
Shift();
|
|
}
|
|
else
|
|
// -> unknown directive
|
|
Error("unknown directive: %s", Idtf);
|
|
break;
|
|
case ATT_IDTF:
|
|
// need a keyword here to avoid parsing random function contents
|
|
// after a syntax error in a function
|
|
// check for object-local variable definition (local)
|
|
if (SEqual(Idtf, C4AUL_LocalNamed) || SEqual(Idtf, C4AUL_GlobalNamed))
|
|
{
|
|
script->declarations.push_back(Parse_Var());
|
|
Match(ATT_SCOLON);
|
|
}
|
|
// check for variable definition (static)
|
|
else
|
|
script->declarations.push_back(Parse_ToplevelFunctionDecl());
|
|
break;
|
|
case ATT_EOF:
|
|
return script;
|
|
default:
|
|
UnexpectedToken("declaration");
|
|
}
|
|
first_error = true;
|
|
}
|
|
catch (C4AulError &err)
|
|
{
|
|
if (first_error)
|
|
{
|
|
++Engine->errCnt;
|
|
::ScriptEngine.ErrorHandler->OnError(err.what());
|
|
}
|
|
first_error = false;
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::FunctionDecl> C4AulParse::Parse_ToplevelFunctionDecl()
|
|
{
|
|
const char *NodeStart = TokenSPos;
|
|
bool is_global = SEqual(Idtf, C4AUL_Global);
|
|
// skip access modifier
|
|
if (SEqual(Idtf, C4AUL_Private) ||
|
|
SEqual(Idtf, C4AUL_Protected) ||
|
|
SEqual(Idtf, C4AUL_Public) ||
|
|
SEqual(Idtf, C4AUL_Global))
|
|
{
|
|
Shift();
|
|
}
|
|
|
|
// check for func declaration
|
|
if (!SEqual(Idtf, C4AUL_Func))
|
|
Error("Declaration expected, but found identifier: %s", Idtf);
|
|
Shift();
|
|
// get next token, must be func name
|
|
Check(ATT_IDTF, "function name");
|
|
|
|
auto func = ::aul::ast::FunctionDecl::New(NodeStart, Idtf);
|
|
func->is_global = is_global;
|
|
Shift();
|
|
Parse_Function(func.get());
|
|
return func;
|
|
}
|
|
|
|
void C4AulParse::Parse_Function(::aul::ast::Function *func)
|
|
{
|
|
Match(ATT_BOPEN);
|
|
// get pars
|
|
while (TokenType != ATT_BCLOSE)
|
|
{
|
|
// too many parameters?
|
|
if (func->params.size() >= C4AUL_MAX_Par)
|
|
throw C4AulParseError(this, "'func' parameter list: too many parameters (max 10)");
|
|
if (TokenType == ATT_LDOTS)
|
|
{
|
|
func->has_unnamed_params = true;
|
|
Shift();
|
|
// don't allow any more parameters after ellipsis
|
|
break;
|
|
}
|
|
// must be a name or type now
|
|
Check(ATT_IDTF, "parameter, '...', or ')'");
|
|
// type identifier?
|
|
C4V_Type t = C4V_Any;
|
|
if (SEqual(Idtf, C4AUL_TypeInt)) { t = C4V_Int; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeBool)) { t = C4V_Bool; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeC4ID)) { t = C4V_Def; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeDef)) { t = C4V_Def; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeEffect)) { t = C4V_Effect; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeC4Object)) { t = C4V_Object; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypePropList)) { t = C4V_PropList; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeString)) { t = C4V_String; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeArray)) { t = C4V_Array; Shift(); }
|
|
else if (SEqual(Idtf, C4AUL_TypeFunction)) { t = C4V_Function; Shift(); }
|
|
// a parameter name which matched a type name?
|
|
std::string par_name;
|
|
if (TokenType == ATT_BCLOSE || TokenType == ATT_COMMA)
|
|
{
|
|
par_name = Idtf;
|
|
Warn(C4AulWarningId::type_name_used_as_par_name, Idtf);
|
|
}
|
|
else
|
|
{
|
|
Check(ATT_IDTF, "parameter name");
|
|
par_name = Idtf;
|
|
Shift();
|
|
}
|
|
func->params.emplace_back(par_name, t);
|
|
// end of params?
|
|
if (TokenType == ATT_BCLOSE)
|
|
{
|
|
break;
|
|
}
|
|
// must be a comma now
|
|
Match(ATT_COMMA, "',' or ')'");
|
|
}
|
|
Match(ATT_BCLOSE);
|
|
func->body = Parse_Block();
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::Block> C4AulParse::Parse_Block()
|
|
{
|
|
auto block = ::aul::ast::Block::New(TokenSPos);
|
|
Match(ATT_BLOPEN);
|
|
while (TokenType != ATT_BLCLOSE)
|
|
{
|
|
block->children.push_back(Parse_Statement());
|
|
}
|
|
Shift();
|
|
return block;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::Stmt> C4AulParse::Parse_Statement()
|
|
{
|
|
const char *NodeStart = TokenSPos;
|
|
std::unique_ptr<::aul::ast::Stmt> stmt;
|
|
switch (TokenType)
|
|
{
|
|
// do we have a block start?
|
|
case ATT_BLOPEN:
|
|
return Parse_Block();
|
|
case ATT_BOPEN:
|
|
case ATT_BOPEN2:
|
|
case ATT_SET:
|
|
case ATT_OPERATOR:
|
|
case ATT_INT:
|
|
case ATT_STRING:
|
|
{
|
|
stmt = Parse_Expression();
|
|
Match(ATT_SCOLON);
|
|
return stmt;
|
|
}
|
|
// additional function separator
|
|
case ATT_SCOLON:
|
|
Shift();
|
|
return ::aul::ast::Noop::New(NodeStart);
|
|
case ATT_IDTF:
|
|
// check for variable definition
|
|
if (SEqual(Idtf, C4AUL_VarNamed) || SEqual(Idtf, C4AUL_LocalNamed) || SEqual(Idtf, C4AUL_GlobalNamed))
|
|
stmt = Parse_Var();
|
|
// check new-form func begin
|
|
else if (SEqual(Idtf, C4AUL_Func) ||
|
|
SEqual(Idtf, C4AUL_Private) ||
|
|
SEqual(Idtf, C4AUL_Protected) ||
|
|
SEqual(Idtf, C4AUL_Public) ||
|
|
SEqual(Idtf, C4AUL_Global))
|
|
{
|
|
throw C4AulParseError(this, "unexpected end of function");
|
|
}
|
|
// get function by identifier: first check special functions
|
|
else if (SEqual(Idtf, C4AUL_If)) // if
|
|
{
|
|
return Parse_If();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Else)) // else
|
|
{
|
|
throw C4AulParseError(this, "misplaced 'else'");
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Do)) // while
|
|
{
|
|
stmt = Parse_DoWhile();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_While)) // while
|
|
{
|
|
return Parse_While();
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_For)) // for
|
|
{
|
|
PushParsePos();
|
|
Shift();
|
|
// Look if it's the for([var] foo in array)-form
|
|
// must be followed by a bracket
|
|
Match(ATT_BOPEN);
|
|
// optional var
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
Shift();
|
|
// variable and "in"
|
|
if (TokenType == ATT_IDTF
|
|
&& GetNextToken() == ATT_IDTF
|
|
&& SEqual(Idtf, C4AUL_In))
|
|
{
|
|
// reparse the stuff in the brackets like normal statements
|
|
PopParsePos();
|
|
return Parse_ForEach();
|
|
}
|
|
else
|
|
{
|
|
// reparse the stuff in the brackets like normal statements
|
|
PopParsePos();
|
|
return Parse_For();
|
|
}
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Return)) // return
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_SCOLON)
|
|
{
|
|
// allow return; without return value (implies nil)
|
|
stmt = ::aul::ast::Return::New(NodeStart, ::aul::ast::NilLit::New(NodeStart));
|
|
}
|
|
else
|
|
{
|
|
// return retval;
|
|
stmt = ::aul::ast::Return::New(NodeStart, Parse_Expression());
|
|
}
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Break)) // break
|
|
{
|
|
Shift();
|
|
stmt = ::aul::ast::Break::New(NodeStart);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Continue)) // continue
|
|
{
|
|
Shift();
|
|
stmt = ::aul::ast::Continue::New(NodeStart);
|
|
}
|
|
else
|
|
{
|
|
stmt = Parse_Expression();
|
|
}
|
|
Match(ATT_SCOLON);
|
|
assert(stmt);
|
|
return stmt;
|
|
default:
|
|
UnexpectedToken("statement");
|
|
}
|
|
}
|
|
|
|
void C4AulParse::Parse_CallParams(::aul::ast::CallExpr *call)
|
|
{
|
|
assert(call != nullptr);
|
|
assert(call->args.empty());
|
|
|
|
// so it's a regular function; force "("
|
|
Match(ATT_BOPEN);
|
|
while(TokenType != ATT_BCLOSE) switch(TokenType)
|
|
{
|
|
case ATT_COMMA:
|
|
// got no parameter before a ","
|
|
Warn(C4AulWarningId::empty_parameter_in_call, (unsigned)call->args.size(), call->callee.c_str());
|
|
call->args.push_back(::aul::ast::NilLit::New(TokenSPos));
|
|
Shift();
|
|
break;
|
|
case ATT_LDOTS:
|
|
// functions using ... always take as many parameters as possible
|
|
Shift();
|
|
call->append_unnamed_pars = true;
|
|
// Do not allow more parameters even if there is space left
|
|
Check(ATT_BCLOSE);
|
|
break;
|
|
default:
|
|
// get a parameter
|
|
call->args.push_back(Parse_Expression());
|
|
// end of parameter list?
|
|
if (TokenType != ATT_BCLOSE)
|
|
Match(ATT_COMMA, "',' or ')'");
|
|
break;
|
|
}
|
|
Match(ATT_BCLOSE);
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::ArrayLit> C4AulParse::Parse_Array()
|
|
{
|
|
auto arr = ::aul::ast::ArrayLit::New(TokenSPos);
|
|
// force "["
|
|
Match(ATT_BOPEN2);
|
|
// Create an array
|
|
while (TokenType != ATT_BCLOSE2)
|
|
{
|
|
// got no parameter before a ","? then push nil
|
|
if (TokenType == ATT_COMMA)
|
|
{
|
|
Warn(C4AulWarningId::empty_parameter_in_array, (unsigned)arr->values.size());
|
|
arr->values.emplace_back(::aul::ast::NilLit::New(TokenSPos));
|
|
}
|
|
else
|
|
arr->values.emplace_back(Parse_Expression());
|
|
if (TokenType == ATT_BCLOSE2)
|
|
break;
|
|
Match(ATT_COMMA, "',' or ']'");
|
|
// [] -> size 0, [*,] -> size 2, [*,*,] -> size 3
|
|
if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
Warn(C4AulWarningId::empty_parameter_in_array, (unsigned)arr->values.size());
|
|
arr->values.emplace_back(::aul::ast::NilLit::New(TokenSPos));
|
|
}
|
|
}
|
|
Shift();
|
|
return arr;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::ProplistLit> C4AulParse::Parse_PropList()
|
|
{
|
|
auto proplist = ::aul::ast::ProplistLit::New(TokenSPos);
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_New))
|
|
{
|
|
Shift();
|
|
proplist->values.emplace_back(Strings.P[P_Prototype].GetCStr(), Parse_Expression());
|
|
}
|
|
Match(ATT_BLOPEN);
|
|
while (TokenType != ATT_BLCLOSE)
|
|
{
|
|
std::string key;
|
|
if (TokenType == ATT_IDTF)
|
|
{
|
|
key = Idtf;
|
|
Shift();
|
|
}
|
|
else if (TokenType == ATT_STRING)
|
|
{
|
|
key = cStr->GetCStr();
|
|
Shift();
|
|
}
|
|
else UnexpectedToken("string or identifier");
|
|
if (TokenType != ATT_COLON && TokenType != ATT_SET)
|
|
UnexpectedToken("':' or '='");
|
|
Shift();
|
|
proplist->values.emplace_back(key, Parse_Expression());
|
|
if (TokenType == ATT_COMMA)
|
|
Shift();
|
|
else if (TokenType != ATT_BLCLOSE)
|
|
UnexpectedToken("'}' or ','");
|
|
}
|
|
Shift();
|
|
return proplist;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::DoLoop> C4AulParse::Parse_DoWhile()
|
|
{
|
|
auto loop = ::aul::ast::DoLoop::New(TokenSPos);
|
|
Shift();
|
|
loop->body = Parse_Statement();
|
|
// Execute condition
|
|
if (TokenType != ATT_IDTF || !SEqual(Idtf, C4AUL_While))
|
|
UnexpectedToken("'while'");
|
|
Shift();
|
|
Match(ATT_BOPEN);
|
|
loop->cond = Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
return loop;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::WhileLoop> C4AulParse::Parse_While()
|
|
{
|
|
auto loop = ::aul::ast::WhileLoop::New(TokenSPos);
|
|
Shift();
|
|
// Execute condition
|
|
Match(ATT_BOPEN);
|
|
loop->cond = Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// Execute body
|
|
loop->body = Parse_Statement();
|
|
return loop;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::If> C4AulParse::Parse_If()
|
|
{
|
|
auto stmt = ::aul::ast::If::New(TokenSPos);
|
|
Shift();
|
|
Match(ATT_BOPEN);
|
|
stmt->cond = Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// parse controlled statement
|
|
stmt->iftrue = Parse_Statement();
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_Else))
|
|
{
|
|
Shift();
|
|
// expect a command now
|
|
stmt->iffalse = Parse_Statement();
|
|
}
|
|
return stmt;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::ForLoop> C4AulParse::Parse_For()
|
|
{
|
|
auto loop = ::aul::ast::ForLoop::New(TokenSPos);
|
|
Match(ATT_IDTF); Match(ATT_BOPEN);
|
|
// Initialization
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
loop->init = Parse_Var();
|
|
}
|
|
else if (TokenType != ATT_SCOLON)
|
|
{
|
|
loop->init = Parse_Expression();
|
|
}
|
|
// Consume first semicolon
|
|
Match(ATT_SCOLON);
|
|
// Condition
|
|
if (TokenType != ATT_SCOLON)
|
|
{
|
|
loop->cond = Parse_Expression();
|
|
}
|
|
// Consume second semicolon
|
|
Match(ATT_SCOLON);
|
|
// Incrementor
|
|
if (TokenType != ATT_BCLOSE)
|
|
{
|
|
loop->incr = Parse_Expression();
|
|
}
|
|
// Consume closing bracket
|
|
Match(ATT_BCLOSE);
|
|
loop->body = Parse_Statement();
|
|
return loop;
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::RangeLoop> C4AulParse::Parse_ForEach()
|
|
{
|
|
auto loop = ::aul::ast::RangeLoop::New(TokenSPos);
|
|
Match(ATT_IDTF); Match(ATT_BOPEN);
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
loop->scoped_var = true;
|
|
Shift();
|
|
}
|
|
// get variable name
|
|
Check(ATT_IDTF, "variable name");
|
|
loop->var = Idtf;
|
|
Shift();
|
|
if (TokenType != ATT_IDTF || !SEqual(Idtf, C4AUL_In))
|
|
UnexpectedToken("'in'");
|
|
Shift();
|
|
// get expression for array
|
|
loop->cond = Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
// loop body
|
|
loop->body = Parse_Statement();
|
|
return loop;
|
|
}
|
|
|
|
static bool GetPropertyByS(const C4PropList * p, const char * s, C4Value & v)
|
|
{
|
|
C4String * k = Strings.FindString(s);
|
|
if (!k) return false;
|
|
return p->GetPropertyByS(k, &v);
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::Expr> C4AulParse::Parse_Expression(int iParentPrio)
|
|
{
|
|
const char *NodeStart = TokenSPos;
|
|
std::unique_ptr<::aul::ast::Expr> expr;
|
|
const C4ScriptOpDef * op;
|
|
C4AulFunc *FoundFn = nullptr;
|
|
C4Value val;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_IDTF:
|
|
// XXX: Resolving literals here means that you can't create a variable
|
|
// with the names "true", "false", "nil" or "this" anymore. I don't
|
|
// consider this too much of a problem, because there is never a reason
|
|
// to do this and it makes my job a lot easier
|
|
if (SEqual(Idtf, C4AUL_True))
|
|
{
|
|
Shift();
|
|
expr = ::aul::ast::BoolLit::New(NodeStart, true);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_False))
|
|
{
|
|
Shift();
|
|
expr = ::aul::ast::BoolLit::New(NodeStart, false);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Nil))
|
|
{
|
|
Shift();
|
|
expr = ::aul::ast::NilLit::New(NodeStart);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_this))
|
|
{
|
|
Shift();
|
|
if (TokenType == ATT_BOPEN)
|
|
{
|
|
Shift();
|
|
Match(ATT_BCLOSE);
|
|
// TODO: maybe warn about "this" with parentheses?
|
|
}
|
|
expr = ::aul::ast::ThisLit::New(NodeStart);
|
|
}
|
|
// XXX: Other things that people aren't allowed to do anymore: name their variables or functions any of:
|
|
// "if", "else", "for", "while", "do", "return", or "Par".
|
|
// We could allow variables with these names and disambiguate based on the syntax, but no.
|
|
else if (SEqual(Idtf, C4AUL_If) || SEqual(Idtf, C4AUL_Else) || SEqual(Idtf, C4AUL_For) || SEqual(Idtf, C4AUL_While) || SEqual(Idtf, C4AUL_Do) || SEqual(Idtf, C4AUL_Return))
|
|
{
|
|
Error("reserved identifier not allowed in expressions: %s", Idtf);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Par))
|
|
{
|
|
Shift();
|
|
// "Par" is special in that it isn't a function and thus doesn't accept an arbitrary number of parameters
|
|
Match(ATT_BOPEN);
|
|
expr = ::aul::ast::ParExpr::New(NodeStart, Parse_Expression());
|
|
Match(ATT_BCLOSE);
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_New))
|
|
{
|
|
// Because people might call a variables or functions "new", we need to look ahead and guess whether it's a proplist constructor.
|
|
PushParsePos();
|
|
Shift();
|
|
if (TokenType == ATT_IDTF)
|
|
{
|
|
// this must be a proplist because two identifiers can't immediately follow each other
|
|
PopParsePos();
|
|
expr = Parse_PropList();
|
|
}
|
|
else
|
|
{
|
|
// Some non-identifier means this is either a variable, a function, or a syntax error. Which one exactly is something we'll figure out later.
|
|
PopParsePos();
|
|
}
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_Func))
|
|
{
|
|
PushParsePos();
|
|
Shift();
|
|
if (TokenType == ATT_BOPEN)
|
|
{
|
|
auto func = ::aul::ast::FunctionExpr::New(NodeStart);
|
|
Parse_Function(func.get());
|
|
expr = std::move(func);
|
|
DiscardParsePos();
|
|
}
|
|
else
|
|
{
|
|
PopParsePos();
|
|
}
|
|
}
|
|
if (!expr)
|
|
{
|
|
// If we end up here, it must be a proper identifier (or a reserved word that's used as an identifier).
|
|
// Time to look ahead and see whether it's a function call.
|
|
std::string identifier = Idtf;
|
|
Shift();
|
|
if (TokenType == ATT_BOPEN)
|
|
{
|
|
// Well, it looks like one, at least
|
|
auto func = ::aul::ast::CallExpr::New(NodeStart);
|
|
func->callee = identifier;
|
|
Parse_CallParams(func.get());
|
|
expr = std::move(func);
|
|
}
|
|
else
|
|
{
|
|
// It's most certainly not a function call.
|
|
expr = ::aul::ast::VarExpr::New(NodeStart, identifier);
|
|
}
|
|
}
|
|
break;
|
|
case ATT_INT: // constant in cInt
|
|
expr = ::aul::ast::IntLit::New(NodeStart, cInt);
|
|
Shift();
|
|
break;
|
|
case ATT_STRING: // reference in cStr
|
|
expr = ::aul::ast::StringLit::New(NodeStart, cStr->GetCStr());
|
|
Shift();
|
|
break;
|
|
case ATT_OPERATOR:
|
|
// -> must be a prefix operator
|
|
op = &C4ScriptOpMap[cInt];
|
|
// postfix?
|
|
if (op->Postfix)
|
|
// oops. that's wrong
|
|
throw C4AulParseError(this, "postfix operator without first expression");
|
|
Shift();
|
|
// generate code for the following expression
|
|
expr = Parse_Expression(op->Priority);
|
|
if (SEqual(op->Identifier, "+"))
|
|
{
|
|
// This is a no-op.
|
|
}
|
|
else
|
|
{
|
|
expr = ::aul::ast::UnOpExpr::New(NodeStart, op - C4ScriptOpMap, std::move(expr));
|
|
}
|
|
break;
|
|
case ATT_BOPEN:
|
|
Shift();
|
|
expr = Parse_Expression();
|
|
Match(ATT_BCLOSE);
|
|
break;
|
|
case ATT_BOPEN2:
|
|
expr = Parse_Array();
|
|
break;
|
|
case ATT_BLOPEN:
|
|
expr = Parse_PropList();
|
|
break;
|
|
default:
|
|
UnexpectedToken("expression");
|
|
}
|
|
|
|
assert(expr);
|
|
|
|
while (true)
|
|
{
|
|
NodeStart = TokenSPos;
|
|
switch (TokenType)
|
|
{
|
|
case ATT_SET:
|
|
{
|
|
// back out of any kind of parent operator
|
|
// (except other setters, as those are right-associative)
|
|
if (iParentPrio > 1)
|
|
return expr;
|
|
Shift();
|
|
expr = ::aul::ast::AssignmentExpr::New(NodeStart, std::move(expr), Parse_Expression(1));
|
|
break;
|
|
}
|
|
case ATT_OPERATOR:
|
|
{
|
|
// expect postfix operator
|
|
const C4ScriptOpDef * op = &C4ScriptOpMap[cInt];
|
|
if (!op->Postfix)
|
|
{
|
|
// does an operator with the same name exist?
|
|
// when it's a postfix-operator, it can be used instead.
|
|
const C4ScriptOpDef * postfixop;
|
|
for (postfixop = op + 1; postfixop->Identifier; ++postfixop)
|
|
if (SEqual(op->Identifier, postfixop->Identifier))
|
|
if (postfixop->Postfix)
|
|
break;
|
|
// not found?
|
|
if (!postfixop->Identifier)
|
|
{
|
|
Error("unexpected prefix operator: %s", op->Identifier);
|
|
}
|
|
// otherwise use the new-found correct postfix operator
|
|
op = postfixop;
|
|
}
|
|
|
|
if (iParentPrio + !op->Changer > op->Priority)
|
|
return expr;
|
|
|
|
Shift();
|
|
if (op->NoSecondStatement)
|
|
{
|
|
// Postfix unary op
|
|
expr = ::aul::ast::UnOpExpr::New(NodeStart, op - C4ScriptOpMap, std::move(expr));
|
|
}
|
|
else
|
|
{
|
|
expr = ::aul::ast::BinOpExpr::New(NodeStart, op - C4ScriptOpMap, std::move(expr), Parse_Expression(op->Priority));
|
|
}
|
|
break;
|
|
}
|
|
case ATT_BOPEN2:
|
|
{
|
|
// parse either [index], or [start:end] in which case either index is optional
|
|
Shift();
|
|
::aul::ast::ExprPtr start;
|
|
if (TokenType == ATT_COLON)
|
|
start = ::aul::ast::IntLit::New(TokenSPos, 0); // slice with first index missing -> implicit start index zero
|
|
else
|
|
start = Parse_Expression();
|
|
|
|
if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
expr = ::aul::ast::SubscriptExpr::New(NodeStart, std::move(expr), std::move(start));
|
|
}
|
|
else if (TokenType == ATT_COLON)
|
|
{
|
|
Shift();
|
|
::aul::ast::ExprPtr end;
|
|
if (TokenType == ATT_BCLOSE2)
|
|
{
|
|
end = ::aul::ast::IntLit::New(TokenSPos, std::numeric_limits<int32_t>::max());
|
|
}
|
|
else
|
|
{
|
|
end = Parse_Expression();
|
|
}
|
|
expr = ::aul::ast::SliceExpr::New(NodeStart, std::move(expr), std::move(start), std::move(end));
|
|
}
|
|
else
|
|
{
|
|
UnexpectedToken("']' or ':'");
|
|
}
|
|
Match(ATT_BCLOSE2);
|
|
break;
|
|
}
|
|
case ATT_DOT:
|
|
Shift();
|
|
Check(ATT_IDTF, "property name");
|
|
expr = ::aul::ast::SubscriptExpr::New(NodeStart, std::move(expr), ::aul::ast::StringLit::New(TokenSPos, Idtf));
|
|
Shift();
|
|
break;
|
|
case ATT_CALL: case ATT_CALLFS:
|
|
{
|
|
auto call = ::aul::ast::CallExpr::New(NodeStart);
|
|
call->context = std::move(expr);
|
|
call->safe_call = TokenType == ATT_CALLFS;
|
|
Shift();
|
|
Check(ATT_IDTF, "function name after '->'");
|
|
call->callee = Idtf;
|
|
Shift();
|
|
Parse_CallParams(call.get());
|
|
expr = std::move(call);
|
|
break;
|
|
}
|
|
default:
|
|
return expr;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<::aul::ast::VarDecl> C4AulParse::Parse_Var()
|
|
{
|
|
auto decl = ::aul::ast::VarDecl::New(TokenSPos);
|
|
if (SEqual(Idtf, C4AUL_VarNamed))
|
|
{
|
|
decl->scope = ::aul::ast::VarDecl::Scope::Func;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_LocalNamed))
|
|
{
|
|
decl->scope = ::aul::ast::VarDecl::Scope::Object;
|
|
}
|
|
else if (SEqual(Idtf, C4AUL_GlobalNamed))
|
|
{
|
|
decl->scope = ::aul::ast::VarDecl::Scope::Global;
|
|
}
|
|
else
|
|
{
|
|
assert(0 && "C4AulParse::Parse_Var called with invalid parse state (current token should be scope of variable)");
|
|
// Uh this shouldn't happen, ever
|
|
Error("internal error: C4AulParse::Parse_Var called with invalid parse state (current token should be scope of variable, but is '%s')", Idtf);
|
|
}
|
|
Shift();
|
|
if (TokenType == ATT_IDTF && SEqual(Idtf, C4AUL_Const))
|
|
{
|
|
decl->constant = true;
|
|
Shift();
|
|
}
|
|
while (true)
|
|
{
|
|
// get desired variable name
|
|
Check(ATT_IDTF, "variable name");
|
|
std::string identifier = Idtf;
|
|
Shift();
|
|
::aul::ast::ExprPtr init;
|
|
if (TokenType == ATT_SET)
|
|
{
|
|
Shift();
|
|
init = Parse_Expression();
|
|
}
|
|
decl->decls.push_back({ identifier, std::move(init) });
|
|
if (TokenType == ATT_SCOLON)
|
|
return decl;
|
|
Match(ATT_COMMA, "',' or ';'");
|
|
}
|
|
}
|
|
|
|
void C4ScriptHost::CopyPropList(C4Set<C4Property> & from, C4PropListStatic * to)
|
|
{
|
|
// append all funcs and local variable initializations
|
|
const C4Property * prop = from.First();
|
|
while (prop)
|
|
{
|
|
switch(prop->Value.GetType())
|
|
{
|
|
case C4V_Function:
|
|
{
|
|
C4AulScriptFunc * sf = prop->Value.getFunction()->SFunc();
|
|
if (sf)
|
|
{
|
|
C4AulScriptFunc *sfc;
|
|
if (sf->pOrgScript != this)
|
|
sfc = new C4AulScriptFunc(to, *sf);
|
|
else
|
|
sfc = sf;
|
|
sfc->SetOverloaded(to->GetFunc(sf->Name));
|
|
to->SetPropertyByS(prop->Key, C4VFunction(sfc));
|
|
}
|
|
else
|
|
{
|
|
// engine function
|
|
to->SetPropertyByS(prop->Key, prop->Value);
|
|
}
|
|
}
|
|
break;
|
|
case C4V_PropList:
|
|
{
|
|
C4PropListStatic * p = prop->Value._getPropList()->IsStatic();
|
|
assert(p);
|
|
if (prop->Key != &::Strings.P[P_Prototype])
|
|
if (!p || p->GetParent() != to)
|
|
{
|
|
p = C4PropList::NewStatic(nullptr, to, prop->Key);
|
|
CopyPropList(prop->Value._getPropList()->Properties, p);
|
|
}
|
|
to->SetPropertyByS(prop->Key, C4VPropList(p));
|
|
}
|
|
break;
|
|
case C4V_Array: // FIXME: copy the array if necessary
|
|
default:
|
|
to->SetPropertyByS(prop->Key, prop->Value);
|
|
}
|
|
prop = from.Next(prop);
|
|
}
|
|
}
|
|
|
|
bool C4ScriptHost::Parse()
|
|
{
|
|
// check state
|
|
if (State != ASS_LINKED) return false;
|
|
|
|
if (!Appends.empty())
|
|
{
|
|
// #appendto scripts are not allowed to contain global functions or belong to definitions
|
|
// so their contents are not reachable
|
|
return true;
|
|
}
|
|
|
|
C4PropListStatic * p = GetPropList();
|
|
|
|
for (auto & SourceScript : SourceScripts)
|
|
{
|
|
CopyPropList(SourceScript->LocalValues, p);
|
|
if (SourceScript == this)
|
|
continue;
|
|
// definition appends
|
|
if (GetPropList() && GetPropList()->GetDef() && SourceScript->GetPropList() && SourceScript->GetPropList()->GetDef())
|
|
GetPropList()->GetDef()->IncludeDefinition(SourceScript->GetPropList()->GetDef());
|
|
}
|
|
|
|
// generate bytecode
|
|
for (auto &s : SourceScripts)
|
|
C4AulCompiler::Compile(this, s, s->ast.get());
|
|
|
|
// save line count
|
|
Engine->lineCnt += SGetLine(Script.getData(), Script.getPtr(Script.getLength()));
|
|
|
|
// finished
|
|
State = ASS_PARSED;
|
|
|
|
return true;
|
|
}
|
|
|
|
void C4ScriptHost::EnableWarning(const char *pos, C4AulWarningId warning, bool enable)
|
|
{
|
|
auto entry = enabledWarnings.emplace(pos, decltype(enabledWarnings)::mapped_type{});
|
|
if (entry.second)
|
|
{
|
|
// If there was no earlier entry for this position, copy the previous
|
|
// warning state
|
|
assert(entry.first != enabledWarnings.begin());
|
|
auto previous = entry.first;
|
|
--previous;
|
|
entry.first->second = previous->second;
|
|
}
|
|
entry.first->second.set(static_cast<size_t>(warning), enable);
|
|
}
|
|
|
|
bool C4ScriptHost::IsWarningEnabled(const char *pos, C4AulWarningId warning) const
|
|
{
|
|
assert(!enabledWarnings.empty());
|
|
if (enabledWarnings.empty())
|
|
return false;
|
|
|
|
// find nearest set of warnings at or before the current position
|
|
auto entry = enabledWarnings.upper_bound(pos);
|
|
assert(entry != enabledWarnings.begin());
|
|
if (entry != enabledWarnings.begin())
|
|
{
|
|
--entry;
|
|
}
|
|
|
|
return entry->second.test(static_cast<size_t>(warning));
|
|
}
|
|
|
|
void C4AulParse::PushParsePos()
|
|
{
|
|
parse_pos_stack.push(TokenSPos);
|
|
}
|
|
|
|
void C4AulParse::PopParsePos()
|
|
{
|
|
assert(!parse_pos_stack.empty());
|
|
SPos = parse_pos_stack.top();
|
|
DiscardParsePos();
|
|
Shift();
|
|
}
|
|
|
|
void C4AulParse::DiscardParsePos()
|
|
{
|
|
assert(!parse_pos_stack.empty());
|
|
parse_pos_stack.pop();
|
|
}
|