lcfOS: python/ppci/c3/parser.py annotate

annotate python/ppci/c3/parser.py @ 306:b145f8e6050b

Start on c3 rewrite

author	Windel Bouwman
date	Mon, 09 Dec 2013 19:00:21 +0100
parents	6753763d3bec
children	e609d5296ee9

rev	line source
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	1 import logging
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	2 from ppci import CompilerError
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	3 from .astnodes import Member, Literal, TypeCast, Unop, Binop
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	4 from .astnodes import Assignment, ExpressionStatement, CompoundStatement
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	5 from .astnodes import ReturnStatement, WhileStatement, IfStatement
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	6 from .astnodes import FunctionType, Function, FormalParameter
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	7 from .astnodes import StructureType, DefinedType, PointerType
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	8 from .astnodes import Constant, Variable
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	9 from .astnodes import StructField, Deref
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	10 from .astnodes import Package
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	11 from .astnodes import Identifier
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	12 from .astnodes import FunctionCall
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	13 from .astnodes import EmptyStatement
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	14
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	15
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	16 class Parser:
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	17 """ Parses sourcecode into an abstract syntax tree (AST) """
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	18 def __init__(self, diag):
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	19 self.logger = logging.getLogger('c3')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	20 self.diag = diag
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	21
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	22 def parseSource(self, tokens):
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	23 self.logger.info('Parsing source')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	24 self.tokens = tokens
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	25 self.token = self.tokens.__next__()
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	26 try:
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	27 self.parsePackage()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	28 self.mod.ok = True # Valid until proven wrong :)
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	29 return self.mod
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	30 except CompilerError as e:
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	31 self.diag.addDiag(e)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	32
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	33 def Error(self, msg):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	34 raise CompilerError(msg, self.token.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	35
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	36 # Lexer helpers:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	37 def Consume(self, typ):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	38 if self.Peak == typ:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	39 return self.NextToken()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	40 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	41 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	42
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	43 @property
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	44 def Peak(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	45 return self.token.typ
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	46
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	47 @property
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	48 def CurLoc(self):
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	49 return self.token.loc
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	50
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	51 def hasConsumed(self, typ):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	52 if self.Peak == typ:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	53 self.Consume(typ)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	54 return True
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	55 return False
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	56
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	57 def NextToken(self):
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	58 t = self.token
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	59 if t.typ != 'END':
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	60 self.token = self.tokens.__next__()
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	61 return t
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	62
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	63 def addDeclaration(self, decl):
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	64 self.currentPart.declarations.append(decl)
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	65
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	66 def parseImport(self):
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	67 self.Consume('import')
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	68 name = self.Consume('ID').val
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	69 self.mod.imports.append(name)
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	70 self.Consume(';')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	71
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	72 def parsePackage(self):
284 05184b95fa16 Moved tests to seperate folder Windel Bouwman parents: 280 diff changeset	73 self.Consume('module')
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	74 name = self.Consume('ID')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	75 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	76 self.mod = Package(name.val, name.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	77 self.currentPart = self.mod
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	78 while self.Peak != 'END':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	79 self.parseTopLevel()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	80 self.Consume('END')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	81
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	82 def parseTopLevel(self):
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	83 if self.Peak == 'function':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	84 self.parseFunctionDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	85 elif self.Peak == 'var':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	86 self.parseVarDef()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	87 # TODO handle variable initialization
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	88 elif self.Peak == 'const':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	89 self.parseConstDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	90 elif self.Peak == 'type':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	91 self.parseTypeDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	92 elif self.Peak == 'import':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	93 self.parseImport()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	94 else:
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	95 self.Error('Expected function, var, const or type')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	96
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	97 def parseDesignator(self):
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	98 """ A designator designates an object with a name. """
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	99 name = self.Consume('ID')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	100 return Identifier(name.val, name.loc)
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	101
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	102 def parseIdSequence(self):
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	103 ids = [self.Consume('ID')]
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	104 while self.hasConsumed(','):
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	105 ids.append(self.Consume('ID'))
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	106 return ids
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	107
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	108 # Type system
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	109 def parseTypeSpec(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	110 # For now, do simple type spec, just parse an ID:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	111 if self.Peak == 'struct':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	112 self.Consume('struct')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	113 self.Consume('{')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	114 mems = []
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	115 while self.Peak != '}':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	116 mem_t = self.parseTypeSpec()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	117 for i in self.parseIdSequence():
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	118 mems.append(StructField(i.val, mem_t))
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	119 self.Consume(';')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	120 self.Consume('}')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	121 theT = StructureType(mems)
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	122 elif self.Peak == 'enum':
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	123 # TODO)
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	124 raise NotImplementedError()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	125 else:
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	126 theT = self.PostFixExpression()
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	127 # Check for pointer suffix:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	128 while self.hasConsumed('*'):
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	129 theT = PointerType(theT)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	130 return theT
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	131
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	132 def parseTypeDef(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	133 self.Consume('type')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	134 newtype = self.parseTypeSpec()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	135 typename = self.Consume('ID')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	136 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	137 df = DefinedType(typename.val, newtype, typename.loc)
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	138 self.addDeclaration(df)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	139
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	140 # Variable declarations:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	141 def parseVarDef(self):
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	142 self.Consume('var')
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	143 t = self.parseTypeSpec()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	144 for name in self.parseIdSequence():
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	145 v = Variable(name.val, t)
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	146 v.loc = name.loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	147 self.addDeclaration(v)
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	148 self.Consume(';')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	149 return EmptyStatement()
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	150
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	151 def parseConstDef(self):
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	152 self.Consume('const')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	153 t = self.parseTypeSpec()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	154 while True:
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	155 name = self.Consume('ID')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	156 self.Consume('=')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	157 val = self.Expression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	158 c = Constant(name.val, t, val)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	159 c.loc = name.loc
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	160 if not self.hasConsumed(','):
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	161 break
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	162 self.Consume(';')
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	163
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	164 def parseFunctionDef(self):
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	165 loc = self.Consume('function').loc
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	166 returntype = self.parseTypeSpec()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	167 fname = self.Consume('ID').val
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	168 f = Function(fname, loc)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	169 self.addDeclaration(f)
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	170 savePart = self.currentPart
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	171 self.currentPart = f
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	172 self.Consume('(')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	173 parameters = []
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	174 if not self.hasConsumed(')'):
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	175 while True:
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	176 typ = self.parseTypeSpec()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	177 name = self.Consume('ID')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	178 param = FormalParameter(name.val, typ)
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	179 param.loc = name.loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	180 self.addDeclaration(param)
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	181 parameters.append(param)
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	182 if not self.hasConsumed(','):
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	183 break
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	184 self.Consume(')')
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	185 paramtypes = [p.typ for p in parameters]
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	186 f.typ = FunctionType(paramtypes, returntype)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	187 f.body = self.parseCompoundStatement()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	188 self.currentPart = savePart
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	189
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	190 def parseIfStatement(self):
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	191 loc = self.Consume('if').loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	192 self.Consume('(')
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	193 condition = self.Expression()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	194 self.Consume(')')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	195 yes = self.Statement()
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	196 no = self.Statement() if self.hasConsumed('else') else EmptyStatement()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	197 return IfStatement(condition, yes, no, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	198
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	199 def parseWhileStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	200 loc = self.Consume('while').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	201 self.Consume('(')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	202 condition = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	203 self.Consume(')')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	204 statements = self.Statement()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	205 return WhileStatement(condition, statements, loc)
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	206
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	207 def parseReturnStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	208 loc = self.Consume('return').loc
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	209 if self.Peak == ';':
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	210 expr = Literal(0, loc)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	211 else:
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	212 expr = self.Expression()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	213 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	214 return ReturnStatement(expr, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	215
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	216 def parseCompoundStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	217 self.Consume('{')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	218 statements = []
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	219 while not self.hasConsumed('}'):
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	220 statements.append(self.Statement())
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	221 return CompoundStatement(statements)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	222
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	223 def Statement(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	224 # 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	225 if self.Peak == 'if':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	226 return self.parseIfStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	227 elif self.Peak == 'while':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	228 return self.parseWhileStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	229 elif self.Peak == '{':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	230 return self.parseCompoundStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	231 elif self.hasConsumed(';'):
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	232 return EmptyStatement()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	233 elif self.Peak == 'var':
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	234 return self.parseVarDef()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	235 elif self.Peak == 'return':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	236 return self.parseReturnStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	237 else:
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	238 x = self.UnaryExpression()
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	239 if self.Peak == '=':
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	240 # We enter assignment mode here.
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	241 loc = self.Consume('=').loc
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	242 rhs = self.Expression()
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	243 return Assignment(x, rhs, loc)
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	244 else:
b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	245 return ExpressionStatement(x, x.loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	246
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	247 # Expression section:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	248 # We not implement these C constructs:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	249 # a(2), f = 2
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	250 # and this:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	251 # a = 2 < x : 4 ? 1;
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	252
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	253 def Expression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	254 exp = self.LogicalAndExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	255 while self.Peak == 'or':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	256 loc = self.Consume('or').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	257 e2 = self.LogicalAndExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	258 exp = Binop(exp, 'or', e2, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	259 return exp
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	260
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	261 def LogicalAndExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	262 o = self.EqualityExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	263 while self.Peak == 'and':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	264 loc = self.Consume('and').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	265 o2 = self.EqualityExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	266 o = Binop(o, 'and', o2, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	267 return o
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	268
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	269 def EqualityExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	270 ee = self.SimpleExpression()
300 158068af716c yafm Windel Bouwman parents: 296 diff changeset	271 while self.Peak in ['<', '==', '>', '>=', '<=', '!=']:
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	272 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	273 ee2 = self.SimpleExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	274 ee = Binop(ee, op.typ, ee2, op.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	275 return ee
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	276
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	277 def SimpleExpression(self):
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	278 """ Shift operations before + and - ? """
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	279 e = self.AddExpression()
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	280 while self.Peak in ['>>', '<<']:
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	281 op = self.Consume(self.Peak)
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	282 e2 = self.AddExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	283 e = Binop(e, op.typ, e2, op.loc)
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	284 return e
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	285
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	286 def AddExpression(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	287 e = self.Term()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	288 while self.Peak in ['+', '-']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	289 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	290 e2 = self.Term()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	291 e = Binop(e, op.typ, e2, op.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	292 return e
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	293
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	294 def Term(self):
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	295 t = self.BitwiseOr()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	296 while self.Peak in ['*', '/']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	297 op = self.Consume(self.Peak)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	298 t2 = self.BitwiseOr()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	299 t = Binop(t, op.typ, t2, op.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	300 return t
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	301
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	302 def BitwiseOr(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	303 a = self.BitwiseAnd()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	304 while self.Peak == '\|':
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	305 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	306 b = self.BitwiseAnd()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	307 a = Binop(a, op.typ, b, op.loc)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	308 return a
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	309
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	310 def BitwiseAnd(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	311 a = self.CastExpression()
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	312 while self.Peak == '&':
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	313 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	314 b = self.CastExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	315 a = Binop(a, op.typ, b, op.loc)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	316 return a
220 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 # Domain of unary expressions:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	319
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	320 def CastExpression(self):
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	321 """
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	322 the C-style type cast conflicts with '(' expr ')'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	323 so introduce extra keyword 'cast'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	324 """
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	325 if self.Peak == 'cast':
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	326 loc = self.Consume('cast').loc
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	327 self.Consume('<')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	328 t = self.parseTypeSpec()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	329 self.Consume('>')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	330 self.Consume('(')
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	331 ce = self.Expression()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	332 self.Consume(')')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	333 return TypeCast(t, ce, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	334 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	335 return self.UnaryExpression()
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	336
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	337 def UnaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	338 if self.Peak in ['&', '*']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	339 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	340 ce = self.CastExpression()
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	341 if op.val == '*':
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	342 return Deref(ce, op.loc)
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	343 else:
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	344 return Unop(op.typ, ce, op.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	345 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	346 return self.PostFixExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	347
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	348 def PostFixExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	349 pfe = self.PrimaryExpression()
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	350 if self.hasConsumed('('):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	351 # Function call
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	352 args = []
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	353 if not self.hasConsumed(')'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	354 args.append(self.Expression())
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	355 while self.hasConsumed(','):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	356 args.append(self.Expression())
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	357 self.Consume(')')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	358 pfe = FunctionCall(pfe, args, pfe.loc)
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	359 else:
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	360 while self.Peak in ['[', '.', '->']:
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	361 if self.hasConsumed('['):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	362 raise NotImplementedError('Array not yet implemented')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	363 elif self.hasConsumed('->'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	364 field = self.Consume('ID')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	365 pfe = Deref(pfe, pfe.loc)
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	366 pfe = Member(pfe, field.val, field.loc)
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	367 elif self.hasConsumed('.'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	368 field = self.Consume('ID')
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	369 pfe = Member(pfe, field.val, field.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	370 return pfe
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	371
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	372 def PrimaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	373 if self.hasConsumed('('):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	374 e = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	375 self.Consume(')')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	376 return e
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	377 elif self.Peak == 'NUMBER':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	378 val = self.Consume('NUMBER')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	379 return Literal(val.val, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	380 elif self.Peak == 'REAL':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	381 val = self.Consume('REAL')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	382 return Literal(val.val, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	383 elif self.Peak == 'true':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	384 val = self.Consume('true')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	385 return Literal(True, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	386 elif self.Peak == 'false':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	387 val = self.Consume('false')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	388 return Literal(False, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	389 elif self.Peak == 'ID':
306 b145f8e6050b Start on c3 rewrite Windel Bouwman parents: 301 diff changeset	390 return self.parseDesignator()
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))

Mercurial > lcfOS

annotate python/ppci/c3/parser.py @ 306:b145f8e6050b