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Nikolaj Gade
2024-02-21 15:37:38 +01:00
parent 153216ce63
commit ee2817afbb
11 changed files with 40 additions and 36 deletions
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36
plthy_impl/parser.py
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@ -8,9 +8,9 @@ class Parser():
self.pg = ParserGenerator(
[i[0] for i in ALL_TOKENS],
precedence=[
('left', ["KEYWORD_MAYBE", "KEYWORD_RETURN"]),
('left', ["KEYWORD_IF", "KEYWORD_BECAUSE", "KEYWORD_UNTIL", "KEYWORD_DEFINE", "KEYWORD_AS"]),
('left', ["KEYWORD_DO", "BUILTIN", "SYMBOL_SET"]),
('left', ["KEYWORD_SET", "SYMBOL_SET", "KEYWORD_IF", "KEYWORD_MAYBE", "KEYWORD_RETURN"]),
('left', [ "KEYWORD_BECAUSE", "KEYWORD_UNTIL", "KEYWORD_DEFINE", "KEYWORD_AS"]),
('left', ["KEYWORD_DO", "BUILTIN"]),
('left', ["SYMBOL_EQUALS", "SYMBOL_LT","SYMBOL_GT"]),
('left', ["SYMBOL_PLUS", "SYMBOL_MINUS", "SYMBOL_OR", "SYMBOL_AND"]),
('left', ["SYMBOL_TIMES", "SYMBOL_DIVIDE", "SYMBOL_TILDE"])
@ -33,7 +33,7 @@ class Parser():
return [tokens[0]] + tokens[2]
## statement ##
@self.pg.production('statement : KEYWORD_SET expression SYMBOL_SET ID', precedence="SYMBOL_SET")
@self.pg.production('statement : KEYWORD_SET expression SYMBOL_SET ID')
def statement_set(tokens):
return ast_nodes.StatementSet(tokens[1], tokens[3].value)
@ -45,18 +45,6 @@ class Parser():
def statement_maybe(tokens):
return ast_nodes.Maybe(tokens[1])
@self.pg.production('statement : statement KEYWORD_IF expression')
def statement_if(tokens):
return ast_nodes.StatementIf(tokens[0], tokens[2])
@self.pg.production('statement : statement KEYWORD_BECAUSE expression')
def statement_because(tokens):
return ast_nodes.StatementBecause(tokens[0], tokens[2])
@self.pg.production('statement : KEYWORD_UNTIL expression statement')
def statement_until(tokens):
return ast_nodes.StatementUntil(tokens[2],tokens[1])
@self.pg.production('statement : KEYWORD_DEFINE ID SYMBOL_LT DATA_INT SYMBOL_GT KEYWORD_AS statement', precedence="KEYWORD_DEFINE")
def statement_define(tokens):
return ast_nodes.StatementDefine(tokens[1].value, int(tokens[3].value), tokens[6])
@ -78,6 +66,18 @@ class Parser():
def command_call(tokens):
return ast_nodes.Call(tokens[1].value,tokens[4])
@self.pg.production('command : statement KEYWORD_IF expression')
def command_if(tokens):
return ast_nodes.CommandIf(tokens[0], tokens[2])
@self.pg.production('command : statement KEYWORD_BECAUSE expression')
def command_because(tokens):
return ast_nodes.CommandBecause(tokens[0], tokens[2])
@self.pg.production('command : statement KEYWORD_UNTIL expression')
def command_until(tokens):
return ast_nodes.CommandUntil(tokens[0],tokens[2])
## expressions ##
@self.pg.production('expressions : ')
def expressions_none(_):
@ -92,6 +92,10 @@ class Parser():
def exp_int(tokens):
return ast_nodes.ExpInt(int(tokens[0].value))
@self.pg.production('expression : SYMBOL_LPARENS expression SYMBOL_RPARENS')
def exp_paren(tokens):
return tokens[1]
@self.pg.production('expression : DATA_FLOAT')
def exp_float(tokens):
return ast_nodes.ExpInt(float(tokens[0].value))