lcfOS: python/c3/parser.py annotate

annotate python/c3/parser.py @ 251:6ed3d3a82a63

Added another c3 example. First import attempt

author	Windel Bouwman
date	Mon, 29 Jul 2013 20:23:13 +0200
parents	e621e3ba78d2
children	bd26dc13f270

rev	line source
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	1 from . import astnodes, lexer
152 b73bc14a3aa3 Light coupling ide and c3 frontend Windel Bouwman parents: 150 diff changeset	2 from ppci import CompilerError
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	3
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	4 class Parser:
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	5 """ Parses sourcecode into an abstract syntax tree (AST) """
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	6 def __init__(self, diag):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	7 self.diag = diag
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	8
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	9 def parseSource(self, source):
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	10 self.initLex(source)
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	11 try:
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	12 self.parsePackage()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	13 return self.mod
152 b73bc14a3aa3 Light coupling ide and c3 frontend Windel Bouwman parents: 150 diff changeset	14 except CompilerError as e:
b73bc14a3aa3 Light coupling ide and c3 frontend Windel Bouwman parents: 150 diff changeset	15 self.diag.addDiag(e)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	16
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	17 def Error(self, msg):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	18 raise CompilerError(msg, self.token.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	19
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	20 # Lexer helpers:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	21 def Consume(self, typ):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	22 if self.Peak == typ:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	23 return self.NextToken()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	24 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	25 self.Error('Excected: "{0}", got "{1}"'.format(typ, self.Peak))
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	26
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	27 @property
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	28 def Peak(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	29 return self.token.typ
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	30
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	31 @property
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	32 def CurLoc(self):
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	33 return self.token.loc
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	34
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	35 def hasConsumed(self, typ):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	36 if self.Peak == typ:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	37 self.Consume(typ)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	38 return True
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	39 return False
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	40
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	41 def NextToken(self):
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	42 t = self.token
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	43 if t.typ != 'END':
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	44 self.token = self.tokens.__next__()
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	45 return t
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	46
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	47 def initLex(self, source):
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	48 self.tokens = lexer.tokenize(source) # Lexical stage
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	49 self.token = self.tokens.__next__()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	50
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	51 def addDeclaration(self, decl):
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	52 self.currentPart.declarations.append(decl)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	53
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	54 def parseImport(self):
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	55 self.Consume('import')
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	56 name = self.Consume('ID').val
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	57 self.mod.imports.append(name)
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	58 self.Consume(';')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	59
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	60 def parsePackage(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	61 self.Consume('package')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	62 name = self.Consume('ID')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	63 self.Consume(';')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	64 self.mod = astnodes.Package(name.val, name.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	65 self.currentPart = self.mod
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	66 while self.Peak != 'END':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	67 self.parseTopLevel()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	68 self.Consume('END')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	69
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	70 def parseTopLevel(self):
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	71 if self.Peak == 'function':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	72 self.parseFunctionDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	73 elif self.Peak == 'var':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	74 self.parseVarDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	75 elif self.Peak == 'const':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	76 self.parseConstDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	77 elif self.Peak == 'type':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	78 self.parseTypeDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	79 elif self.Peak == 'import':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	80 self.parseImport()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	81 else:
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	82 self.Error('Expected function, var, const or type')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	83
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	84 def parseDesignator(self):
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	85 """ A designator designates an object """
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	86 name = self.Consume('ID')
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	87 return astnodes.Designator(name.val, name.loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	88
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	89 # Type system
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	90 def parseTypeSpec(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	91 # For now, do simple type spec, just parse an ID:
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	92 #return self.parseDesignator()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	93 if self.Peak == 'struct':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	94 self.Consume('struct')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	95 self.Consume('{')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	96 mems = []
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	97 while self.Peak != '}':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	98 mem_t = self.parseTypeSpec()
226 240111e0456f Work on named types Windel Bouwman parents: 225 diff changeset	99 mem_n = self.Consume('ID').val
227 82dfe6a32717 Fixed tests Windel Bouwman parents: 226 diff changeset	100 mems.append(astnodes.StructField(mem_n, mem_t))
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	101 while self.hasConsumed(','):
226 240111e0456f Work on named types Windel Bouwman parents: 225 diff changeset	102 mem_n = self.Consume('ID').val
227 82dfe6a32717 Fixed tests Windel Bouwman parents: 226 diff changeset	103 mems.append(astnodes.StructField(mem_n, mem_t))
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	104 self.Consume(';')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	105 self.Consume('}')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	106 theT = astnodes.StructureType(mems)
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	107 else:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	108 theT = self.parseDesignator()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	109 # Check for pointer suffix:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	110 while self.hasConsumed('*'):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	111 theT = astnodes.PointerType(theT)
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	112 return theT
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	113
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	114 def parseTypeDef(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	115 self.Consume('type')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	116 newtype = self.parseTypeSpec()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	117 typename = self.Consume('ID')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	118 self.Consume(';')
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	119 df = astnodes.DefinedType(typename.val, newtype, typename.loc)
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	120 self.addDeclaration(df)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	121
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	122 # Variable declarations:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	123 def parseVarDef(self):
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	124 self.Consume('var')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	125 t = self.parseTypeSpec()
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	126 def parseVar():
74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	127 name = self.Consume('ID')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	128 v = astnodes.Variable(name.val, t)
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	129 v.loc = name.loc
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	130 if self.hasConsumed('='):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	131 v.ival = self.Expression()
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	132 self.addDeclaration(v)
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	133 parseVar()
74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	134 while self.hasConsumed(','):
74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	135 parseVar()
157 8f3924b6076e Added some code generator things Windel Bouwman parents: 155 diff changeset	136 self.Consume(';')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	137
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	138 def parseConstDef(self):
163 8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	139 self.Consume('const')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	140 t = self.parseTypeSpec()
163 8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	141 def parseConst():
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	142 name = self.Consume('ID')
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	143 self.Consume('=')
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	144 val = self.Expression()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	145 c = astnodes.Constant(name.val, t, val)
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	146 c.loc = name.loc
163 8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	147 parseConst()
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	148 while self.hasConsumed(','):
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	149 parseConst()
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	150 self.Consume(';')
8104fc8b5e90 Added visitor to c3 Windel Bouwman parents: 158 diff changeset	151
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	152 # Procedures
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	153 def parseFunctionDef(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	154 loc = self.Consume('function').loc
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	155 returntype = self.parseTypeSpec()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	156 fname = self.Consume('ID').val
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	157 f = astnodes.Function(fname, loc)
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	158 self.addDeclaration(f)
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	159 savePart = self.currentPart
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	160 self.currentPart = f
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	161 self.Consume('(')
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	162 parameters = []
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	163 if not self.hasConsumed(')'):
150 4ae0e02599de Added type check start and analyze phase Windel Bouwman parents: 149 diff changeset	164 def parseParameter():
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	165 typ = self.parseTypeSpec()
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	166 name = self.Consume('ID')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	167 param = astnodes.Variable(name.val, typ)
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	168 param.loc = name.loc
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	169 self.addDeclaration(param)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	170 parameters.append(param)
150 4ae0e02599de Added type check start and analyze phase Windel Bouwman parents: 149 diff changeset	171 parseParameter()
4ae0e02599de Added type check start and analyze phase Windel Bouwman parents: 149 diff changeset	172 while self.hasConsumed(','):
4ae0e02599de Added type check start and analyze phase Windel Bouwman parents: 149 diff changeset	173 parseParameter()
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	174 self.Consume(')')
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	175 paramtypes = [p.typ for p in parameters]
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	176 f.typ = astnodes.FunctionType(paramtypes, returntype)
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	177 f.body = self.parseCompoundStatement()
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	178 self.currentPart = savePart
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	179
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	180 # Statements:
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	181
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	182 def parseIfStatement(self):
165 598d3888a11c Added front class and fided AST view Windel Bouwman parents: 164 diff changeset	183 loc = self.Consume('if').loc
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	184 self.Consume('(')
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	185 condition = self.Expression()
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	186 self.Consume(')')
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	187 yes = self.parseCompoundStatement()
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	188 if self.hasConsumed('else'):
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	189 no = self.parseCompoundStatement()
165 598d3888a11c Added front class and fided AST view Windel Bouwman parents: 164 diff changeset	190 else:
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	191 no = None
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	192 return astnodes.IfStatement(condition, yes, no, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	193
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	194 def parseWhileStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	195 loc = self.Consume('while').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	196 self.Consume('(')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	197 condition = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	198 self.Consume(')')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	199 statements = self.parseCompoundStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	200 return astnodes.WhileStatement(condition, statements, loc)
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	201
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	202 def parseReturnStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	203 loc = self.Consume('return').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	204 expr = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	205 self.Consume(';')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	206 return astnodes.ReturnStatement(expr, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	207
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	208 def parseCompoundStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	209 self.Consume('{')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	210 statements = []
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	211 while not self.hasConsumed('}'):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	212 s = self.Statement()
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	213 if s is None:
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	214 continue
166 da0087b82fbe Improved type checking Windel Bouwman parents: 165 diff changeset	215 statements.append(s)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	216 return astnodes.CompoundStatement(statements)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	217
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	218 def Statement(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	219 # Determine statement type based on the pending token:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	220 if self.Peak == 'if':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	221 return self.parseIfStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	222 elif self.Peak == 'while':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	223 return self.parseWhileStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	224 elif self.Peak == '{':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	225 return self.parseCompoundStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	226 elif self.hasConsumed(';'):
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	227 pass
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	228 elif self.Peak == 'var':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	229 self.parseVarDef()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	230 elif self.Peak == 'return':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	231 return self.parseReturnStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	232 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	233 return self.AssignmentOrCall()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	234
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	235 def AssignmentOrCall(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	236 x = self.UnaryExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	237 if self.Peak == '=':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	238 # We enter assignment mode here.
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	239 loc = self.Consume('=').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	240 rhs = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	241 return astnodes.Assignment(x, rhs, loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	242 else:
222 c3f1ce8b638f Fixup of parser Windel Bouwman parents: 221 diff changeset	243 return astnodes.ExpressionStatement(x, x.loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	244
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	245 # Expression section:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	246 # We not implement these C constructs:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	247 # a(2), f = 2
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	248 # and this:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	249 # a = 2 < x : 4 ? 1;
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	250
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	251 def Expression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	252 exp = self.LogicalAndExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	253 while self.Peak == 'or':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	254 loc = self.Consume('or').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	255 e2 = self.LogicalAndExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	256 exp = astnodes.Binop(exp, 'or', e2, loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	257 return exp
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	258
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	259 def LogicalAndExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	260 o = self.EqualityExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	261 while self.Peak == 'and':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	262 loc = self.Consume('and').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	263 o2 = self.EqualityExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	264 o = astnodes.Binop(o, 'and', o2, loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	265 return o
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	266
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	267 def EqualityExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	268 ee = self.SimpleExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	269 while self.Peak in ['<', '==', '>']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	270 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	271 ee2 = self.SimpleExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	272 ee = astnodes.Binop(ee, op.typ, ee2, op.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	273 return ee
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	274
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	275 def SimpleExpression(self):
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	276 """ Shift operations before + and - ? """
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	277 e = self.AddExpression()
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	278 while self.Peak in ['>>', '<<']:
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	279 op = self.Consume(self.Peak)
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	280 e2 = self.AddExpression()
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	281 e = astnodes.Binop(e, op.typ, e2, op.loc)
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	282 return e
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	283
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	284 def AddExpression(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	285 e = self.Term()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	286 while self.Peak in ['+', '-']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	287 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	288 e2 = self.Term()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	289 e = astnodes.Binop(e, op.typ, e2, op.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	290 return e
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	291
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	292 def Term(self):
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	293 t = self.BitwiseOr()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	294 while self.Peak in ['*', '/']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	295 op = self.Consume(self.Peak)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	296 t2 = self.BitwiseOr()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	297 t = astnodes.Binop(t, op.typ, t2, op.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	298 return t
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	299
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	300 def BitwiseOr(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	301 a = self.BitwiseAnd()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	302 while self.Peak in ['\|']:
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	303 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	304 b = self.BitwiseAnd()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	305 a = astnodes.Binop(a, op.typ, b, op.loc)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	306 return a
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	307
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	308 def BitwiseAnd(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	309 a = self.CastExpression()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	310 while self.Peak in ['&']:
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	311 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	312 b = self.CastExpression()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	313 a = astnodes.Binop(a, op.typ, b, op.loc)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	314 return a
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	315
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	316 # Domain of unary expressions:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	317
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	318 def CastExpression(self):
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	319 """
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	320 the C-style type cast conflicts with '(' expr ')'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	321 so introduce extra keyword 'cast'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	322 """
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	323 if self.Peak == 'cast':
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	324 loc = self.Consume('cast').loc
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	325 self.Consume('<')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	326 t = self.parseTypeSpec()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	327 self.Consume('>')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	328 self.Consume('(')
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	329 ce = self.Expression()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	330 self.Consume(')')
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	331 return astnodes.TypeCast(t, ce, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	332 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	333 return self.UnaryExpression()
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	334
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	335 def UnaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	336 if self.Peak in ['&', '*']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	337 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	338 ce = self.CastExpression()
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	339 if op.val == '*':
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	340 return astnodes.Deref(ce, op.loc)
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	341 else:
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	342 return astnodes.Unop(op.typ, ce, op.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	343 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	344 return self.PostFixExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	345
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	346 def PostFixExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	347 pfe = self.PrimaryExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	348 while self.Peak in ['[', '(', '.', '->']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	349 if self.hasConsumed('['):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	350 pass
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	351 elif self.hasConsumed('('):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	352 # Function call
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	353 args = []
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	354 if not self.hasConsumed(')'):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	355 args.append(self.Expression())
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	356 while self.hasConsumed(','):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	357 args.append(self.Expression())
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	358 self.Consume(')')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	359 pfe = astnodes.FunctionCall(pfe, args, pfe.loc)
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	360 elif self.hasConsumed('->'):
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	361 field = self.Consume('ID')
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	362 pfe = astnodes.Deref(pfe, pfe.loc)
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	363 pfe = astnodes.FieldRef(pfe, field.val, field.loc)
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	364 elif self.hasConsumed('.'):
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	365 field = self.Consume('ID')
1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	366 pfe = astnodes.FieldRef(pfe, field.val, field.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	367 else:
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	368 raise Exception()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	369 return pfe
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	370
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	371 def PrimaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	372 if self.hasConsumed('('):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	373 e = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	374 self.Consume(')')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	375 return e
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	376 elif self.Peak == 'NUMBER':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	377 val = self.Consume('NUMBER')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	378 return astnodes.Literal(val.val, val.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	379 elif self.Peak == 'REAL':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	380 val = self.Consume('REAL')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	381 return astnodes.Literal(val.val, val.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	382 elif self.Peak == 'true':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	383 val = self.Consume('true')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	384 return astnodes.Literal(True, val.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	385 elif self.Peak == 'false':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	386 val = self.Consume('false')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	387 return astnodes.Literal(False, val.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	388 elif self.Peak == 'ID':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	389 d = self.parseDesignator()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	390 return astnodes.VariableUse(d, d.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	391 self.Error('Expected NUM, ID or (expr), got {0}'.format(self.Peak))
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	392
e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	393

Mercurial > lcfOS

annotate python/c3/parser.py @ 251:6ed3d3a82a63