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

annotate python/ppci/c3/parser.py @ 301:6753763d3bec

merge codegen into ppci package

author	Windel Bouwman
date	Thu, 05 Dec 2013 17:02:38 +0100
parents	158068af716c
children	b145f8e6050b

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
293 6aa721e7b10b Try to improve build sequence Windel Bouwman parents: 289 diff changeset	3 from .lexer import Lexer
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	4 from .astnodes import FieldRef, Literal, TypeCast, Unop, Binop
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	5 from .astnodes import Assignment, ExpressionStatement, CompoundStatement
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	6 from .astnodes import ReturnStatement, WhileStatement, IfStatement
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	7 from .astnodes import FunctionType, Function, FormalParameter
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	8 from .astnodes import StructureType, DefinedType, PointerType
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	9 from .astnodes import Constant, Variable
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	10 from .astnodes import StructField, Deref
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	11 from .astnodes import Package, ImportDesignator
9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	12 from .astnodes import Designator, VariableUse, FunctionCall
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	13
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	14
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	15 class Parser:
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	16 """ Parses sourcecode into an abstract syntax tree (AST) """
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	17 def __init__(self, diag):
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	18 self.logger = logging.getLogger('c3')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	19 self.diag = diag
293 6aa721e7b10b Try to improve build sequence Windel Bouwman parents: 289 diff changeset	20 self.lexer = Lexer(diag)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	21
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	22 def parseSource(self, source):
254 bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	23 self.logger.info('Parsing source')
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	24 self.initLex(source)
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	25 try:
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	26 self.parsePackage()
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	27 return self.mod
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	28 except CompilerError as e:
bd26dc13f270 Added logger Windel Bouwman parents: 251 diff changeset	29 self.diag.addDiag(e)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	30
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	31 def Error(self, msg):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	32 raise CompilerError(msg, self.token.loc)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	33
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	34 # Lexer helpers:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	35 def Consume(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 return self.NextToken()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	38 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	39 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	40
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	41 @property
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	42 def Peak(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	43 return self.token.typ
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	44
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	45 @property
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	46 def CurLoc(self):
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	47 return self.token.loc
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	48
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	49 def hasConsumed(self, typ):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	50 if self.Peak == typ:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	51 self.Consume(typ)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	52 return True
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	53 return False
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	54
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	55 def NextToken(self):
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	56 t = self.token
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	57 if t.typ != 'END':
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	58 self.token = self.tokens.__next__()
1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	59 return t
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	60
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	61 def initLex(self, source):
293 6aa721e7b10b Try to improve build sequence Windel Bouwman parents: 289 diff changeset	62 self.tokens = self.lexer.tokenize(source)
219 1fa3e0050b49 Expanded ad hoc code generator Windel Bouwman parents: 215 diff changeset	63 self.token = self.tokens.__next__()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	64
215 c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	65 def addDeclaration(self, decl):
c1ccb1cb4cef Major changes in c3 frontend Windel Bouwman parents: 213 diff changeset	66 self.currentPart.declarations.append(decl)
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	67
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	68 def parseImport(self):
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	69 self.Consume('import')
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	70 name = self.Consume('ID').val
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	71 self.mod.imports.append(name)
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	72 self.Consume(';')
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	73
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	74 def parsePackage(self):
284 05184b95fa16 Moved tests to seperate folder Windel Bouwman parents: 280 diff changeset	75 self.Consume('module')
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	76 name = self.Consume('ID')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	77 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	78 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	79 self.currentPart = self.mod
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	80 while self.Peak != 'END':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	81 self.parseTopLevel()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	82 self.Consume('END')
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 parseTopLevel(self):
251 6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	85 if self.Peak == 'function':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	86 self.parseFunctionDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	87 elif self.Peak == 'var':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	88 self.parseVarDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	89 elif self.Peak == 'const':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	90 self.parseConstDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	91 elif self.Peak == 'type':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	92 self.parseTypeDef()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	93 elif self.Peak == 'import':
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	94 self.parseImport()
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	95 else:
6ed3d3a82a63 Added another c3 example. First import attempt Windel Bouwman parents: 232 diff changeset	96 self.Error('Expected function, var, const or type')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	97
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	98 def parseDesignator(self):
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	99 """ A designator designates an object with a name. """
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	100 name = self.Consume('ID')
289 bd2593de3ff8 Semifix burn2 Windel Bouwman parents: 288 diff changeset	101 if self.hasConsumed(':'):
bd2593de3ff8 Semifix burn2 Windel Bouwman parents: 288 diff changeset	102 name2 = self.Consume('ID')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	103 return ImportDesignator(name.val, name2.val, name.loc)
289 bd2593de3ff8 Semifix burn2 Windel Bouwman parents: 288 diff changeset	104 else:
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	105 return Designator(name.val, name.loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	106
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	107 # Type system
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	108 def parseTypeSpec(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	109 # For now, do simple type spec, just parse an ID:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	110 if self.Peak == 'struct':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	111 self.Consume('struct')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	112 self.Consume('{')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	113 mems = []
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	114 while self.Peak != '}':
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	115 mem_t = self.parseTypeSpec()
226 240111e0456f Work on named types Windel Bouwman parents: 225 diff changeset	116 mem_n = self.Consume('ID').val
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	117 mems.append(StructField(mem_n, mem_t))
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	118 while self.hasConsumed(','):
226 240111e0456f Work on named types Windel Bouwman parents: 225 diff changeset	119 mem_n = self.Consume('ID').val
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	120 mems.append(StructField(mem_n, mem_t))
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	121 self.Consume(';')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	122 self.Consume('}')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	123 theT = StructureType(mems)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	124 else:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	125 theT = self.parseDesignator()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	126 # Check for pointer suffix:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	127 while self.hasConsumed('*'):
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	128 theT = PointerType(theT)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	129 return theT
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	130
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	131 def parseTypeDef(self):
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	132 self.Consume('type')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	133 newtype = self.parseTypeSpec()
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	134 typename = self.Consume('ID')
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	135 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	136 df = DefinedType(typename.val, newtype, typename.loc)
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	137 self.addDeclaration(df)
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	138
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	139 # Variable declarations:
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	140 def parseVarDef(self):
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	141 self.Consume('var')
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	142 t = self.parseTypeSpec()
300 158068af716c yafm Windel Bouwman parents: 296 diff changeset	143
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	144 def parseVar():
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	145 name = self.Consume('ID')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	146 v = Variable(name.val, t)
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	147 v.loc = name.loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	148 if self.hasConsumed('='):
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	149 v.ival = self.Expression()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	150 self.addDeclaration(v)
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	151 parseVar()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	152 while self.hasConsumed(','):
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	153 parseVar()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	154 self.Consume(';')
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	155
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	156 def parseConstDef(self):
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	157 self.Consume('const')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	158 t = self.parseTypeSpec()
300 158068af716c yafm Windel Bouwman parents: 296 diff changeset	159
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	160 def parseConst():
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	161 name = self.Consume('ID')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	162 self.Consume('=')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	163 val = self.Expression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	164 c = Constant(name.val, t, val)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	165 c.loc = name.loc
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	166 parseConst()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	167 while self.hasConsumed(','):
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	168 parseConst()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	169 self.Consume(';')
288 a747a45dcd78 Various styling work Windel Bouwman parents: 284 diff changeset	170
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	171 # Procedures
003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	172 def parseFunctionDef(self):
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	173 loc = self.Consume('function').loc
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	174 returntype = self.parseTypeSpec()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	175 fname = self.Consume('ID').val
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	176 f = Function(fname, loc)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	177 self.addDeclaration(f)
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	178 savePart = self.currentPart
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	179 self.currentPart = f
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	180 self.Consume('(')
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	181 parameters = []
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	182 if not self.hasConsumed(')'):
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	183 def parseParameter():
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	184 typ = self.parseTypeSpec()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	185 name = self.Consume('ID')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	186 param = FormalParameter(name.val, typ)
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	187 param.loc = name.loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	188 self.addDeclaration(param)
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	189 parameters.append(param)
150 4ae0e02599de Added type check start and analyze phase Windel Bouwman parents: 149 diff changeset	190 parseParameter()
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	191 while self.hasConsumed(','):
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	192 parseParameter()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	193 self.Consume(')')
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	194 paramtypes = [p.typ for p in parameters]
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	195 f.typ = FunctionType(paramtypes, returntype)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	196 f.body = self.parseCompoundStatement()
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	197 self.currentPart = savePart
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 # Statements:
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	200
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	201 def parseIfStatement(self):
272 e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	202 loc = self.Consume('if').loc
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	203 self.Consume('(')
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	204 condition = self.Expression()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	205 self.Consume(')')
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	206 yes = self.parseCompoundStatement()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	207 if self.hasConsumed('else'):
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	208 no = self.parseCompoundStatement()
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	209 else:
e64bae57cda8 refactor ir Windel Bouwman parents: 254 diff changeset	210 no = None
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	211 return IfStatement(condition, yes, no, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	212
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	213 def parseWhileStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	214 loc = self.Consume('while').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	215 self.Consume('(')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	216 condition = self.Expression()
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 = self.parseCompoundStatement()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	219 return WhileStatement(condition, statements, loc)
149 74241ca312cc Fixes on parser and semantics Windel Bouwman parents: 148 diff changeset	220
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	221 def parseReturnStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	222 loc = self.Consume('return').loc
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	223 if self.Peak == ';':
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	224 expr = Literal(0, loc)
280 02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	225 else:
02385f62f250 Rework from str interface to Instruction interface Windel Bouwman parents: 272 diff changeset	226 expr = self.Expression()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	227 self.Consume(';')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	228 return ReturnStatement(expr, loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	229
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	230 def parseCompoundStatement(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	231 self.Consume('{')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	232 statements = []
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	233 while not self.hasConsumed('}'):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	234 s = self.Statement()
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	235 if s is None:
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	236 continue
166 da0087b82fbe Improved type checking Windel Bouwman parents: 165 diff changeset	237 statements.append(s)
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	238 return CompoundStatement(statements)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	239
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	240 def Statement(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	241 # 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	242 if self.Peak == 'if':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	243 return self.parseIfStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	244 elif self.Peak == 'while':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	245 return self.parseWhileStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	246 elif self.Peak == '{':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	247 return self.parseCompoundStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	248 elif self.hasConsumed(';'):
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	249 pass
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	250 elif self.Peak == 'var':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	251 self.parseVarDef()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	252 elif self.Peak == 'return':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	253 return self.parseReturnStatement()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	254 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	255 return self.AssignmentOrCall()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	256
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	257 def AssignmentOrCall(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	258 x = self.UnaryExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	259 if self.Peak == '=':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	260 # We enter assignment mode here.
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	261 loc = self.Consume('=').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	262 rhs = self.Expression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	263 return Assignment(x, rhs, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	264 else:
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	265 return ExpressionStatement(x, x.loc)
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	266
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	267 # Expression section:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	268 # We not implement these C constructs:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	269 # a(2), f = 2
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	270 # and this:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	271 # a = 2 < x : 4 ? 1;
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	272
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	273 def Expression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	274 exp = self.LogicalAndExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	275 while self.Peak == 'or':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	276 loc = self.Consume('or').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	277 e2 = self.LogicalAndExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	278 exp = Binop(exp, 'or', e2, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	279 return exp
148 e5263f74b287 Added c3 language frontend initial parser Windel Bouwman parents: diff changeset	280
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	281 def LogicalAndExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	282 o = self.EqualityExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	283 while self.Peak == 'and':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	284 loc = self.Consume('and').loc
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	285 o2 = self.EqualityExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	286 o = Binop(o, 'and', o2, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	287 return o
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	288
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	289 def EqualityExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	290 ee = self.SimpleExpression()
300 158068af716c yafm Windel Bouwman parents: 296 diff changeset	291 while self.Peak in ['<', '==', '>', '>=', '<=', '!=']:
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	292 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	293 ee2 = self.SimpleExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	294 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	295 return ee
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	296
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	297 def SimpleExpression(self):
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	298 """ Shift operations before + and - ? """
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	299 e = self.AddExpression()
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	300 while self.Peak in ['>>', '<<']:
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	301 op = self.Consume(self.Peak)
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	302 e2 = self.AddExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	303 e = Binop(e, op.typ, e2, op.loc)
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	304 return e
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	305
e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	306 def AddExpression(self):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	307 e = self.Term()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	308 while self.Peak in ['+', '-']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	309 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	310 e2 = self.Term()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	311 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	312 return e
213 003c8a976fff Merge of semantics and parser again .. Windel Bouwman parents: 186 diff changeset	313
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	314 def Term(self):
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	315 t = self.BitwiseOr()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	316 while self.Peak in ['*', '/']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	317 op = self.Consume(self.Peak)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	318 t2 = self.BitwiseOr()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	319 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	320 return t
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	321
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	322 def BitwiseOr(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	323 a = self.BitwiseAnd()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	324 while self.Peak in ['\|']:
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	325 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	326 b = self.BitwiseAnd()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	327 a = Binop(a, op.typ, b, op.loc)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	328 return a
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	329
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	330 def BitwiseAnd(self):
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	331 a = self.CastExpression()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	332 while self.Peak in ['&']:
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	333 op = self.Consume(self.Peak)
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	334 b = self.CastExpression()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	335 a = Binop(a, op.typ, b, op.loc)
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	336 return a
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	337
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	338 # Domain of unary expressions:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	339
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	340 def CastExpression(self):
228 7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	341 """
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	342 the C-style type cast conflicts with '(' expr ')'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	343 so introduce extra keyword 'cast'
7f18ed9b6b7e Removal of emptystatement class Windel Bouwman parents: 227 diff changeset	344 """
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	345 if self.Peak == 'cast':
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	346 loc = self.Consume('cast').loc
221 848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	347 self.Consume('<')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	348 t = self.parseTypeSpec()
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	349 self.Consume('>')
848c4b15fd0b pointers Windel Bouwman parents: 220 diff changeset	350 self.Consume('(')
232 e621e3ba78d2 Added left shift instruction Windel Bouwman parents: 230 diff changeset	351 ce = self.Expression()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	352 self.Consume(')')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	353 return TypeCast(t, ce, loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	354 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	355 return self.UnaryExpression()
230 88a1e0baef65 Added some tests for IR-code Windel Bouwman parents: 228 diff changeset	356
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	357 def UnaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	358 if self.Peak in ['&', '*']:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	359 op = self.Consume(self.Peak)
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	360 ce = self.CastExpression()
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	361 if op.val == '*':
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	362 return Deref(ce, op.loc)
225 1c7364bd74c7 Fixed pointer deref Windel Bouwman parents: 222 diff changeset	363 else:
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	364 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	365 else:
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	366 return self.PostFixExpression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	367
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	368 def PostFixExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	369 pfe = self.PrimaryExpression()
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	370 if self.hasConsumed('('):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	371 # Function call
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	372 args = []
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	373 if not self.hasConsumed(')'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	374 args.append(self.Expression())
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	375 while self.hasConsumed(','):
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	376 args.append(self.Expression())
301 6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	377 self.Consume(')')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	378 pfe = FunctionCall(pfe, args, pfe.loc)
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	379 else:
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	380 while self.Peak in ['[', '.', '->']:
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	381 if self.hasConsumed('['):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	382 raise NotImplementedError('Array not yet implemented')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	383 elif self.hasConsumed('->'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	384 field = self.Consume('ID')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	385 pfe = Deref(pfe, pfe.loc)
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	386 pfe = FieldRef(pfe, field.val, field.loc)
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	387 elif self.hasConsumed('.'):
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	388 field = self.Consume('ID')
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	389 pfe = FieldRef(pfe, field.val, field.loc)
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	390 else:
6753763d3bec merge codegen into ppci package Windel Bouwman parents: 300 diff changeset	391 raise Exception()
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	392 return pfe
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	393
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	394 def PrimaryExpression(self):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	395 if self.hasConsumed('('):
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	396 e = self.Expression()
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	397 self.Consume(')')
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	398 return e
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	399 elif self.Peak == 'NUMBER':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	400 val = self.Consume('NUMBER')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	401 return Literal(val.val, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	402 elif self.Peak == 'REAL':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	403 val = self.Consume('REAL')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	404 return Literal(val.val, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	405 elif self.Peak == 'true':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	406 val = self.Consume('true')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	407 return Literal(True, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	408 elif self.Peak == 'false':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	409 val = self.Consume('false')
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	410 return Literal(False, val.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	411 elif self.Peak == 'ID':
3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	412 d = self.parseDesignator()
296 9417caea2eb3 Directorized some backend files Windel Bouwman parents: 293 diff changeset	413 return VariableUse(d, d.loc)
220 3f6c30a5d234 Major change in expression parsing to enable pointers and structs Windel Bouwman parents: 219 diff changeset	414 self.Error('Expected NUM, ID or (expr), got {0}'.format(self.Peak))

Mercurial > lcfOS

annotate python/ppci/c3/parser.py @ 301:6753763d3bec