def parse(tokens):
from ast.parameter import Parameter
oldPos = tokens.getPosition()
position = tokens.peek().position
if tokens.peek() != 'def':
tokens.setPosition(oldPos)
return None
tokens.getNext()
name = tokens.getNext()
if name.type != 'identifier':
raise error.SyntaxError, 'Expected function name, got %r' % name
tokens.expect('(')
# parameters
params = []
while True:
param = Parameter.parse(tokens)
if param is not None:
params.append(param)
peek = tokens.peek()
if peek == ')':
break
else:
tokens.expect(',')
tokens.expect(')')
if tokens.peek() == 'as':
tokens.expect('as')
returnType = vartypes.Type.parse(tokens)
if returnType is None:
raise error.SyntaxError(position, 'Expected return type, got %r' % tokens.peek())
else:
returnType = vartypes.VoidType
if tokens.peek() == ':':
raise error.SyntaxError(position, 'Interface function cannot have definition.')
tokens.expect(token.END_OF_STATEMENT)
body = None
return FunctionPrototype(position, name.value, params, returnType)
def parse(tokens):
oldPos = tokens.getPosition()
position = tokens.peek().position
if tokens.peek() != 'delegate':
tokens.setPosition(oldPos)
return None
tokens.getNext()
name = tokens.getNext()
if name.type != 'identifier':
raise error.SyntaxError, 'Expected function name, got %r' % name
tokens.expect('(')
# parameters
params = []
while True:
param = Parameter.parse(tokens)
if param is not None:
params.append(param)
peek = tokens.peek()
if peek == ')':
break
else:
tokens.expect(',')
tokens.expect(')')
if tokens.peek() == 'as':
tokens.expect('as')
returnType = vartypes.Type.parse(tokens)
if returnType is None:
raise error.SyntaxError(position, 'Expected return type, got %r' % tokens.peek())
else:
returnType = vartypes.VoidType
tokens.expect(token.END_OF_STATEMENT)
return DelegateDecl(position, name.value, params, returnType)
def parse(tokens):
from ast.parameter import Parameter
oldPos = tokens.getPosition()
flags = memberflags.MemberFlags()
position = tokens.peek().position
while True:
tok = tokens.getNext()
if tok == 'static':
flags.static = True
elif tok == 'virtual':
flags.virtual = True
elif tok == 'abstract':
flags.abstract = True
elif tok == 'override':
flags.override = True
elif tok == 'sealed':
flags.sealed = True
else:
tokens.unget()
break
if tokens.peek() != 'def':
tokens.setPosition(oldPos)
return None
tokens.getNext()
name = tokens.getNext()
if name.type != 'identifier':
raise error.SyntaxError, 'Expected function name, got %r' % name
tokens.expect('(')
# parameters
params = []
while True:
param = Parameter.parse(tokens)
if param is not None:
params.append(param)
peek = tokens.peek()
if peek == ',':
tokens.expect(',')
continue
elif peek == ')':
break
else:
raise error.SyntaxError, "Expected ',' or ')', got %r" % peek
tokens.expect(')')
if tokens.peek() == 'as':
tokens.expect('as')
returnType = vartypes.Type.parse(tokens)
if returnType is None:
raise error.SyntaxError(position, 'Expected return type, got %r' % tokens.peek())
else:
returnType = vartypes.VoidType
if flags.abstract:
if tokens.peek() == ':':
raise error.SyntaxError(position, 'Abstract function cannot have definition.')
tokens.expect(token.END_OF_STATEMENT)
body = None
else:
tokens.expect(':')
tokens.expect(token.END_OF_STATEMENT)
body = BlockStatement.parse(tokens)
if body is None:
raise error.SyntaxError, 'Expected indented block and function body, got %r' % tokens.peek()
return FunctionDecl(name.value, name.position, returnType, params, body, flags)
