Mercurial > lcfOS

comparison python/c3/parser.py @ 215:c1ccb1cb4cef

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Major changes in c3 frontend
author Windel Bouwman
date Fri, 05 Jul 2013 13:00:03 +0200
parents 003c8a976fff
children 1fa3e0050b49
comparison
equal deleted inserted replaced
214:6875360e8390 215:c1ccb1cb4cef
47 return t 47 return t
48 48
49 def initLex(self, source): 49 def initLex(self, source):
50 self.tokens = lexer.tokenize(source) # Lexical stage 50 self.tokens = lexer.tokenize(source) # Lexical stage
51 self.token = self.tokens.__next__() 51 self.token = self.tokens.__next__()
52 def addDeclaration(self, decl):
53 self.currentPart.declarations.append(decl)
52 54
53 def parseUses(self): 55 def parseUses(self):
54 pass 56 pass
55 57
56 def parsePackage(self): 58 def parsePackage(self):
57 self.Consume('package') 59 self.Consume('package')
58 name = self.Consume('ID') 60 name = self.Consume('ID')
59 self.Consume(';') 61 self.Consume(';')
60 self.mod = astnodes.Package(name.val, name.loc) 62 self.mod = astnodes.Package(name.val, name.loc)
63 self.currentPart = self.mod
61 self.parseUses() 64 self.parseUses()
62 # TODO: parse uses 65 # TODO: parse uses
63 while self.Peak != 'END': 66 while self.Peak != 'END':
64 self.parseTopLevel() 67 self.parseTopLevel()
65 self.Consume('END') 68 self.Consume('END')
123 name = self.Consume('ID') 126 name = self.Consume('ID')
124 v = astnodes.Variable(name.val, t) 127 v = astnodes.Variable(name.val, t)
125 v.loc = name.loc 128 v.loc = name.loc
126 if self.hasConsumed('='): 129 if self.hasConsumed('='):
127 v.ival = self.parseExpression() 130 v.ival = self.parseExpression()
131 self.addDeclaration(v)
128 parseVar() 132 parseVar()
129 while self.hasConsumed(','): 133 while self.hasConsumed(','):
130 parseVar() 134 parseVar()
131 self.Consume(';') 135 self.Consume(';')
132 136
148 def parseFunctionDef(self): 152 def parseFunctionDef(self):
149 loc = self.Consume('function').loc 153 loc = self.Consume('function').loc
150 returntype = self.parseTypeSpec() 154 returntype = self.parseTypeSpec()
151 fname = self.Consume('ID').val 155 fname = self.Consume('ID').val
152 f = astnodes.Function(fname, loc) 156 f = astnodes.Function(fname, loc)
157 self.addDeclaration(f)
158 savePart = self.currentPart
159 self.currentPart = f
153 self.Consume('(') 160 self.Consume('(')
154 parameters = [] 161 parameters = []
155 if not self.hasConsumed(')'): 162 if not self.hasConsumed(')'):
156 def parseParameter(): 163 def parseParameter():
157 typ = self.parseTypeSpec() 164 typ = self.parseTypeSpec()
158 name = self.Consume('ID') 165 name = self.Consume('ID')
159 param = astnodes.Variable(name.val, typ) 166 param = astnodes.Variable(name.val, typ)
160 param.loc = name.loc 167 param.loc = name.loc
168 self.addDeclaration(param)
161 parameters.append(param) 169 parameters.append(param)
162 parseParameter() 170 parseParameter()
163 while self.hasConsumed(','): 171 while self.hasConsumed(','):
164 parseParameter() 172 parseParameter()
165 self.Consume(')') 173 self.Consume(')')
166 body = self.parseCompoundStatement() 174 paramtypes = [p.typ for p in parameters]
175 f.typ = astnodes.FunctionType(paramtypes, returntype)
176 f.body = self.parseCompoundStatement()
177 self.currentPart = savePart
167 178
168 # Statements: 179 # Statements:
169 def parseAssignment(self, lval): 180 def parseAssignment(self, lval):
170 lval = astnodes.VariableUse(lval, lval.loc) 181 lval = astnodes.VariableUse(lval, lval.loc)
171 loc = self.Consume('=').loc 182 loc = self.Consume('=').loc