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iparser.bmx
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iparser.bmx
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' Copyright (c) 2013-2023 Bruce A Henderson
'
' Based on the public domain Monkey "trans" by Mark Sibly
'
' This software is provided 'as-is', without any express or implied
' warranty. In no event will the authors be held liable for any damages
' arising from the use of this software.
'
' Permission is granted to anyone to use this software for any purpose,
' including commercial applications, and to alter it and redistribute it
' freely, subject to the following restrictions:
'
' 1. The origin of this software must not be misrepresented; you must not
' claim that you wrote the original software. If you use this software
' in a product, an acknowledgment in the product documentation would be
' appreciated but is not required.
'
' 2. Altered source versions must be plainly marked as such, and must not be
' misrepresented as being the original software.
'
' 3. This notice may not be removed or altered from any source
' distribution.
'
'SuperStrict
'Import BRL.MaxUtil
'Import "parser_factory.bmx"
Const DECL_GLOBAL:Int = $10
Const DECL_FIELD:Int = $20
Const DECL_CONST:Int = $40
Const DECL_LOCAL:Int = $80
Type TIParser
Field _toker:TToker
Field _toke$
Field _tokeType:Int
Field _tokeSpace:Int
Field _tokerStack:TList=New TList'<TToker>
Method ParseModuleImport:Int(pmod:TModuleDecl, modpath:String, path:String, imp:String = Null, iData:String = Null, attrs:Long = 0, relPath:String = "", isFileImport:Int = 0)
Const STATE_CLASS:Int = 1
If Not modpath Then
modpath = imp
End If
' already imported??
If _appInstance.IsImported(modpath)
' add import to the scope (so we can find decls in it later)
' but don't add it if pmod is the apps' main module
If _appInstance.mainModule <> pmod Then
pmod.AddImport(modpath, _appInstance.globalImports.ValueForKey(modpath))
End If
Return False
Else If imp Then
' if "imp" is set, this is a file import. We need to check for it too, or we may end up importing it twice.
If _appInstance.IsImported(imp)
' add import to the scope (so we can find decls in it later)
' but don't add it if pmod is the apps' main module
If _appInstance.mainModule <> pmod Then
pmod.AddImport(imp, _appInstance.globalImports.ValueForKey(imp))
End If
Return False
End If
End If
Local prefix:String
If isFileImport And opt_buildtype = BUILDTYPE_APP Then
prefix = "m_"
End If
Local _mod:TModuleDecl = New TModuleDecl.Create(prefix + modpath, "bb" + modpath, path, attrs)
Select modpath
Case "brl.classes", "brl.blitzkeywords"
_mod.UpdateFilePath(_mod.filepath + "." + modpath)
End Select
_mod.declImported = True
_mod.relpath = relPath
_mod.pmod = pmod
If modpath = "brl.blitz" Then
If pmod.imported.Contains(modpath) Then
_mod = TModuleDecl(pmod.imported.ValueForKey(modpath))
Else
pmod.AddImport(modpath, _mod)
End If
' import Object and String definitions
Local par:TIParser = New TIParser
If FileType(modulepath("brl.blitz") + "\blitz_classes." + opt_platform + ".i") Then
par.ParseModuleImport(_mod, "brl.classes", modulepath("brl.blitz"), modulepath("brl.blitz") + "\blitz_classes." + opt_platform + ".i")
Else
par.ParseModuleImport(_mod, "brl.classes", modulepath("brl.blitz"), modulepath("brl.blitz") + "\blitz_classes.i")
End If
' set up built-in keywords
par = New TIParser
par.ParseModuleImport(_mod, "brl.blitzkeywords", "", "", MakeKeywords())
Else
pmod.AddImport(modpath, _mod)
End If
_appInstance.globalImports.Insert(modpath, _mod)
Local ipath:String
'Local ipath:String = path + "\" + ModuleIdent(modpath) + ".release.macos.x86.i"
If imp Then
ipath = imp
' add to imports
pmod.AddImport(ipath, _mod)
_appInstance.globalImports.Insert(ipath, _mod)
Else
ipath = path + "/" + ModuleIdent(modpath) + FileMung() + ".i"
End If
If Not iData Then
If Not FileType(ipath) Then
Err "Can't find interface for module '" + modpath + "'"
Return False
End If
'Local ifile:String[] = LoadString(ipath).Split("~n")
_toker = New TToker.Create( ipath,LoadString( ipath ) )
Else
_toker = New TToker.Create( ipath, iData)
End If
Local toker:TToker = _toker
Repeat
Local pos:Int
pos = toker._tokePos
toker.NextToke
Local line:Int
Local state:Int
Local class:TClassDecl
Local stm:String
Select toker.Toke().ToLower()
Case "superstrict"
_mod.attrs :| MODULE_SUPERSTRICT
Continue
Case "import"
toker.NextToke()
If toker.TokeType()=TOKE_SPACE toker.NextToke()
' skip non-module imports
If toker.TokeType()=TOKE_STRINGLIT
Local iRelPath:String = ParseStringLit()
SetErr
If iRelPath.EndsWith(".bmx") Then
Local origPath:String = RealPath(ExtractDir(path) + "/" + iRelPath)
Local iPath:String = OutputFilePath(origPath, FileMung(), "i")
If FileType( iPath )<>FILETYPE_FILE
Err "File '"+ iPath +"' not found."
EndIf
If _mod.imported.Contains( iPath ) Continue
Local modpath:String
If opt_buildtype = BUILDTYPE_MODULE Then
Local dir:String = ExtractDir(origPath).ToLower()
dir = dir[dir.findLast("/") + 1..]
If dir.EndsWith(".mod") Then
dir = ""
Else
dir :+ "_"
End If
Local file:String = StripDir(origPath).ToLower()
modpath = opt_modulename + "_" + dir + StripExt(file)
'sanitize the path, remove non-allowed chars
modpath = TStringHelper.Sanitize(modpath.ToLower())
Else
' todo file imports for apps
'internalErr
End If
' Local mdecl:TDecl=TDecl(pmod.GetDecl( modpath ))
' If Not mdecl
New TIParser.ParseModuleImport( _mod, modpath, origPath, iPath, , , iRelPath)
' Else
' _mod.imported.Insert(modpath, mdecl)
' EndIf
Else
If iRelPath.StartsWith("-") Then
If Not _mod.fileImports.Contains(iRelPath) Then
_mod.fileImports.AddLast(iRelPath)
End If
End If
End If
Else
Local m:String = toker._toke
toker.NextToke()
Parse(".")
m :+ "." + toker._toke
SetErr
Local mdecl:TDecl=TDecl(pmod.GetDecl( m ))
If Not mdecl
Local path:String = modulepath(m)
' parse the imported module
New TIParser.ParseModuleImport( _mod, m, path )
Else
_mod.AddImport(m, mdecl)
EndIf
End If
Continue
Case "moduleinfo"
toker.nextToke()
If toker.TokeType()=TOKE_SPACE toker.NextToke()
Continue
case "#"
toker.nextToke()
Parse("pragma")
toker.nextToke()
Continue
Case "~r", "~n"
Continue
Default
stm = toker.Toke()
Local v:String = toker.NextToke()
Select v
Case "^"
toker.rollback(pos)
toker.NextToke()
' class decl
class = ParseClassDecl( stm,0 )
class.declImported = True
Local parsed:Int
For Local i:Int = 0 Until _toke.Length
Select _toke[i]
Case Asc("F")
class.attrs :| DECL_FINAL
parsed = True
Case Asc("A")
class.attrs :| DECL_ABSTRACT
'ApplyFunctionAttributes(class, DECL_ABSTRACT)
parsed = True
Case Asc("S")
class.attrs :| CLASS_STRUCT
parsed = True
Case Asc("E")
class.attrs :| DECL_EXTERN
ApplyFunctionAttributes(class, DECL_EXTERN)
parsed = True
Case Asc("W")
If opt_platform = "win32" Then
class.attrs :| DECL_API_STDCALL
ApplyFunctionAttributes(class, DECL_API_STDCALL)
End If
parsed = True
Case Asc("I")
class.attrs :| CLASS_INTERFACE
ApplyFunctionAttributes(class, DECL_ABSTRACT)
parsed = True
Case Asc("G")
class.attrs :| CLASS_GENERIC
parsed = True
Case Asc("P")
class.attrs :| DECL_PRIVATE
parsed = True
End Select
Next
If parsed Then
NextToke
End If
If CParse( "=" )
If Not class.IsExtern() Then
class.munged=ParseStringLit()
If class.ident <> "String" Then
For Local fdecl:TFieldDecl = EachIn class._decls
fdecl.munged = "_" + class.munged + "_" + fdecl.ident
fdecl.munged = fdecl.munged.ToLower()
Next
End If
' process generic details
If class.attrs & CLASS_GENERIC Then
If _toke <> "," Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
NextToke
Parse "<"
Local args:TType[]
Local nargs:Int
Repeat
Local arg:TType = ParseType()
If args.Length=nargs args=args+ New TType[10]
args[nargs]=arg
nargs:+1
Until Not CParse(",")
args=args[..nargs]
Parse ">"
Parse "{"
' line no
If _tokeType <> TOKE_INTLIT Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
Local line:Int = _toke.ToInt()
NextToke
Parse ","
' source size
If _tokeType <> TOKE_INTLIT Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
Local size:Int = _toke.ToInt()
NextToke
Parse ","
' path
If _tokeType <> TOKE_STRINGLIT Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
Local path:String = BmxUnquote(_toke)
NextToke
Parse ","
' source
If _tokeType <> TOKE_STRINGLIT Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
Local source:String = BmxUnquote(_toke)
NextToke
Parse "}"
class.templateSource = TTemplateRecord.Load(line, path, size, source)
Local toker:TToker = New TToker.Create(path, class.templateSource.source, False, line)
Local parser:TParser = New TParser.Create( toker, _appInstance )
Local m:TModuleDecl = New TModuleDecl
parser._module = m
Local cdecl:TClassDecl = Null
Select parser._toke
Case "type"
cdecl = parser.ParseClassDecl(parser._toke,0)
Case "interface"
cdecl = parser.ParseClassDecl(parser._toke, CLASS_INTERFACE|DECL_ABSTRACT )
End Select
Local ty:TType = args[0]
Local genDecl:TClassDecl = TClassDecl(_mod.GetDecl(cdecl.IdentLower()))
If Not genDecl Then
genDecl = TClassDecl(pmod.GetDecl(cdecl.identLower()))
End If
If genDecl Then
If Not TIdentType(ty) Or (TIdentType(ty) And TIdentType(ty).ident <> "?") Then
cdecl = genDecl.GenClassInstance(args, True)
Local scopeMunged:String = class.munged
If class.munged.Find("|") >= 0 Then
Local mung:String[] = class.munged.Split("|")
scopeMunged = mung[0]
cdecl.munged = mung[1]
End If
cdecl.scope.munged = scopeMunged
cdecl.scope.scope = _appInstance
End If
' don't add to module
class = Null
Else
class = cdecl
class.declImported = True
If Not TIdentType(ty) Or (TIdentType(ty) And TIdentType(ty).ident <> "?") Then
cdecl = class.GenClassInstance(args)
cdecl.declImported = True
_mod.munged = class.munged
End If
End If
End If
Else
Parse "0"
If Not class.munged Then
class.munged = class.ident
End If
End If
EndIf
If class Then
_mod.InsertDecl(class)
End If
'state = STATE_CLASS
'Exit
Case "\"
toker.rollback(pos)
toker.NextToke()
Local enumDecl:TEnumDecl = ParseEnumDecl( stm )
enumDecl.declImported = True
If CParse("F") Then
enumDecl.isFlags = True
End If
Parse("=")
If _tokeType <> TOKE_STRINGLIT Then
Err "Syntax error - unexpected token '" + _toke + "'"
End If
enumDecl.munged = BmxUnquote(_toke)
_mod.InsertDecl(enumDecl)
Default
If toker._tokeType = TOKE_EOF
Exit
End If
Local a:Long
Local ty:TType = ParseDeclType(a)
If CParse("(") Then
toker.rollback(pos)
toker.NextToke()
Local decl:TFuncDecl = ParseFuncDecl( _toke, 0 )
decl.declImported = True
' an array of function pointers?
If CParse( "&" ) Then
End If
If IstStaticArrayDef() Then
attrs :| DECL_STATIC
End If
While IsArrayDef()
ty = ParseArrayType(ty)
If CParse( "&" ) Then
End If
Wend
If decl.attrs & FUNC_PTR Then
Local fpty:TType = New TFunctionPtrType
TFunctionPtrType(fpty).func = decl
If TArrayType(ty) Then
TArrayType(ty).elemType = fpty
Else
ty = fpty
End If
'Local declInit:TExpr = decl.declInit
'decl.declInit = Null
Local gdecl:TGlobalDecl = New TGlobalDecl.Create( decl.ident,ty, Null, DECL_GLOBAL )
gdecl.munged = decl.munged
_mod.InsertDecl gdecl
gdecl.declImported = True
If CParse( "=" )
If CParse("mem")
If CParse(":")
If CParse("p")
If CParse("(") Then
gdecl.munged = ParseStringLit()
' for function pointers, ensure actual function reference is set too.
'If TFunctionPtrType(gdecl.declTy) Then
' TFunctionPtrType(gdecl.declTy).func.munged = gdecl.munged
'Else If TArrayType(gdecl.declTy) Then
'
'End If
TFunctionPtrType(fpty).func.munged = gdecl.munged
Parse(")")
EndIf
End If
Else
If CParse("(") Then
gdecl.munged = ParseStringLit()
Parse(")")
EndIf
End If
Else
If TStringType(ty)
If CParse("$") Then
gdecl.declInit = ParseUnaryExpr()
End If
Else
' a default value ?
gdecl.declInit = ParseUnaryExpr()
End If
End If
End If
Else
_mod.InsertDecl decl
End If
Else
toker.rollback(pos)
toker.NextToke()
Local decl:TDecl = ParseDecl( _toke, DECL_CONST | DECL_EXTERN)'DECL_GLOBAL | DECL_EXTERN )
_mod.InsertDecl decl
decl.declImported = True
End If
End Select
End Select
line :+ 1
Forever
' semant imported classes
For Local cdecl:TClassDecl = EachIn _mod.Decls()
cdecl.Semant()
If Not cdecl.args Then
cdecl.FinalizeClass()
End If
Next
Return True
End Method
Method ParseUnaryExpr:TExpr()
SkipEols
Local op$=_toke
Select op
Case "+","-","~~","not"
NextToke
Local expr:TExpr=ParseUnaryExpr()
Return New TUnaryExpr.Create( op,expr )
End Select
Return ParsePrimaryExpr( False )
End Method
Method ParsePrimaryExpr:TExpr( stmt:Int )
Local expr:TExpr
Select _tokeType
'Case TOKE_IDENT
' expr=New TIdentExpr.Create( ParseIdent() )
Case TOKE_INTLIT
expr=New TConstExpr.Create( New TIntType,_toke )
NextToke
Case TOKE_LONGLIT
expr=New TConstExpr.Create( New TLongType,_toke )
NextToke
Case TOKE_FLOATLIT
Local value:String = _toke
NextToke
If CParse("!") Then
expr=New TConstExpr.Create( New TDoubleType,value )
Else
CParse("#")
expr=New TConstExpr.Create( New TFloatType,value )
End If
Case TOKE_STRINGLIT
expr=New TConstExpr.Create( New TStringType,BmxUnquote( _toke ) )
NextToke
Case TOKE_IDENT
If _toke = "nan" Or _toke = "inf" Then
Local value:String
Select _toke
Case "inf"
value = "1.#INF0000"
Case "nan"
value = "-1.#IND0000"
End Select
NextToke
If CParse("!") Then
value :+ "00000000"
expr=New TConstExpr.Create( New TDoubleType,value )
Else
CParse("#")
expr=New TConstExpr.Create( New TFloatType,value )
End If
Else
Err "Syntax error - unexpected token '"+_toke+"'"
End If
Default
Err "Syntax error - unexpected token '"+_toke+"'"
End Select
Return expr
End Method
Method ParseClassDecl:TClassDecl( toke$,attrs:Long )
SetErr
'If toke Parse toke
Local id$=ParseIdent()
Local args:TTemplateArg[]
Local superTy:TIdentType
Local imps:TIdentType[]
If CParse( "^" )
If CParse( "null" )
superTy=Null
Else
superTy=ParseIdentType()
'If superTy.ident <> "Object" Then
' superTy = TIdentType(superTy.Semant())
'EndIf
EndIf
Else
superTy = New TIdentType.Create( "brl.classes.object" )
EndIf
' implements
If CParse("@") Then
Local nimps:Int
Repeat
If imps.Length=nimps imps=imps + New TIdentType[10]
imps[nimps]=ParseIdentType()
nimps:+1
Until Not CParse(",")
imps=imps[..nimps]
End If
Local classDecl:TClassDecl=New TClassDecl.Create( id,args,superTy,imps,attrs )
If classDecl.IsExtern()
classDecl.munged=classDecl.ident
If CParse( "=" ) classDecl.munged=ParseStringLit()
EndIf
'If classDecl.IsTemplateArg() Return classDecl
Local decl_attrs:Long=(attrs & DECL_EXTERN)
Local method_attrs:Long=decl_attrs
If attrs & CLASS_INTERFACE method_attrs:|DECL_ABSTRACT
Repeat
SkipEols
'If IsSpace(Asc(_toker._toke))
' _toker.NextToke
'End If
Select _toker._toke
Case "{"
'_toker.
NextToke
Case "}"
'_toker.
NextToke
Exit
Case "-" ' method
'DebugStop
'_toker.
NextToke
Local decl:TFuncDecl = ParseFuncDecl( _toke,method_attrs|FUNC_METHOD, ,classDecl )
decl.declImported = True
'If decl.IsCtor() decl.retTypeExpr=New TObjectType.Create( classDecl )
classDecl.InsertDecl decl
Case "+" ' function
NextToke
Local decl:TFuncDecl = ParseFuncDecl( _toke,method_attrs )
decl.declImported = True
'If decl.IsCtor() decl.retTypeExpr=New TObjectType.Create( classDecl )
classDecl.InsertDecl decl
Case ".", "@", "~~" ' field
Local d_attrs:Long = decl_attrs | DECL_FIELD
If _toker._toke = "." Then
NextToke
Else
While _toker._toke = "@" Or _toker._toke = "~~"
If _toker._toke = "@" Then
d_attrs :| DECL_READ_ONLY
End If
If _toker._toke = "~~" Then
d_attrs :| DECL_STATIC
End If
NextToke
Wend
End If
Local decl:TDecl= ParseDecl( _toke,d_attrs )
classDecl.InsertDecl decl
Rem
Case "private"
NextToke
decl_attrs=decl_attrs | DECL_PRIVATE
Case "public"
NextToke
decl_attrs=decl_attrs & ~DECL_PRIVATE
Case "const","global","field"
If (attrs & CLASS_INTERFACE) And _toke<>"const"
Err "Interfaces can only contain constants and methods."
EndIf
classDecl.InsertDecls ParseDecls( _toke,decl_attrs )
Case "method"
Local decl:TFuncDecl=ParseFuncDecl( _toke,method_attrs )
If decl.IsCtor() decl.retTypeExpr=New TObjectType.Create( classDecl )
classDecl.InsertDecl decl
Case "function"
If (attrs & CLASS_INTERFACE) And _toke<>"const"
Err "Interfaces can only contain constants and methods."
EndIf
Local decl:TFuncDecl=ParseFuncDecl( _toke,decl_attrs )
classDecl.InsertDecl decl
End Rem
'Default
' Err "Syntax error - expecting class member declaration."
End Select
If _toker._tokeType = TOKE_IDENT Then
' Const / Global?
'NextToke
'decl_attrs :| DECL_CONST
Local decl:TDecl= ParseDecl( _toke,decl_attrs | DECL_CONST)
classDecl.InsertDecl decl
decl.declImported = True
End If
Forever
If toke CParse toke
Return classDecl
End Method
Method ParseEnumDecl:TEnumDecl( toke$ )
SetErr
Local id$=ParseIdent()
Local ty:TType
Local attrs:Long
Parse( "\" )
ty=ParseDeclType(attrs, False)
Local enumDecl:TEnumDecl=New TEnumDecl.Create( id, ty, False, Null )
Local index:Int
Repeat
SkipEols
Select _toker._toke
Case "{"
NextToke
Case "}"
NextToke
Exit
Default
Local decl:TEnumValueDecl = ParseEnumValueDecl(_toke, index, ty)
enumDecl.InsertDecl decl
enumDecl.values :+ [decl]
index :+ 1
End Select
Forever
Return enumDecl
End Method
Method ParseEnumValueDecl:TEnumValueDecl(toke:String, index:Int, enumTy:TType)
Local id:String = ParseIdent()
Parse("=")
Local op:String
If _toke = "-" Then
op = "-"
NextToke
End If
Local expr:TExpr = New TConstExpr.Create( enumTy.Copy(), op + _toke )
Local valDecl:TEnumValueDecl = New TEnumValueDecl.Create(id, index, expr)
NextToke
Return valDecl
End Method
Method Parse( toke$ )
If Not CParse( toke )
Err "Syntax error - expecting '"+toke+"'."
EndIf
End Method
Method ParseIdent$()
Select _toker._toke.tolower()
Case "@" _toker.NextToke
Case "string","___array","object"
Case "?"
Default
If _toker._tokeType<>TOKE_IDENT Err "Syntax error - expecting identifier."
End Select
Local id$=_toker._toke
NextToke
Return id
End Method
Method ParseIdentType:TIdentType()
Local id$=ParseIdent()
While CParse( "." )
id:+"."+ParseIdent()
Wend
Local args:TType[]
If CParse( "<" )
Local nargs:Int
Repeat
Local arg:TType = ParseType()
If args.Length=nargs args=args+ New TType[10]
args[nargs]=arg
nargs:+1
Until Not CParse(",")
args=args[..nargs]
Parse ">"
EndIf
Return New TIdentType.Create( id,args )
End Method
Method NextToke$()
Local toke$=_toke
_tokeSpace=False
Repeat
_toke=_toker.NextToke()
_tokeType=_toker.TokeType()
If _tokeType<>TOKE_SPACE Exit
_tokeSpace=True
Forever
If _tokeType=TOKE_KEYWORD _toke=_toke.ToLower()
If toke="," SkipEols
Return _toke
End Method
Method CParse:Int( toke$ )
If _toker._toke.tolower()<>toke.tolower()
Return False
EndIf
'_toker.
NextToke
Return True
End Method
Method CParseToker:Int( toker:TToker, toke$ )
If toker._toke.ToLower()<>toke
Return False
EndIf
NextTokeToker(toker)
Return True
End Method
Method NextTokeToker$(toker:TToker)
Repeat
toker.NextToke()
Until toker.tokeType()<>TOKE_SPACE
Return toker._toke
End Method
Method SkipEols()
Local found:Int = True
While found
found = False
If CParse( "~n" )
found = True
End If
If CParse("~r")
found = True
End If
Wend
SetErr
End Method
Method ParseStringLit$()
If _toker._tokeType<>TOKE_STRINGLIT Err "Expecting string literal."
Local str$=BmxUnquote( _toker._toke )
'_toker.
NextToke
Return str
End Method
Method ParseFuncDecl:TFuncDecl( toke$,attrs:Long, returnType:TType = Null, classDecl:TClassDecl = Null )
SetErr
'If toke Parse toke