def __init__( self, parent = None ):
QsciLexerPostScript.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "%"
return
def parse_file(self, fpath):
lexer = Lexer()
try:
lexer.parse_file(fpath)
except IOError:
raise ParseError, "file not accessible"
return self.parse_with_lexer(lexer)
def parse(filename, context):
file = open(filename, 'r')
try:
lexer = Lexer(file, context)
token = lexer.getToken()
while token.type != 'EOF':
if token.type != 'STRING':
raise UnexpectedTokenError(token.value, 'STRING', 'STRING', line=lexer.getLine())
cmd_name = token.value
token = lexer.getToken()
if token.type != '(':
raise UnexpectedTokenError(token.value, '(', 'STRING', line=lexer.getLine())
cmd_args = []
token = lexer.getToken()
while token.type != ')':
if token.type != 'STRING':
raise UnexpectedTokenError(token.value, 'STRING', line=lexer.getLine())
cmd_args.append(token.value)
token = lexer.getToken()
context.run_cmd(cmd_name, cmd_args)
token = lexer.getToken()
except LanguageError as e:
# fixup filename and line number if needed and re-raise
if not e.getLine(): e.setLine(lexer.getLine())
if not e.getFile(): e.setFile(filename)
raise e
finally:
file.close()
def testLexer(): """ Ukazka pouziti lexeru. """ s = " append (bd fdfdg)" l = Lexer() # timhle si zalozite objekt lexilaniho analyzatoru l.analyzeString(s) # timhle mu reknete, aby naparsoval string, ktery jste napsali while (not l.isEOF()): # tohle slouzi k vypsani vsech tokenu print(l.popToken())
def __init__( self, parent = None ):
QsciLexerProperties.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "#"
return
def test_lexer_extracts_single_integer():
text = "11"
l = Lexer()
l.lex(text)
assert l.get_next_token().value == 11
def __init__( self, parent = None ):
QsciLexerYAML.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "#"
return
def __init__( self, parent = None ):
QsciLexerLua.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "--"
return
def __init__( self, parent = None ):
QsciLexerFortran.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "!"
return
def vhdl_unit_name(file):
""" Given the name of a VHDL file, attempts to find the unit
(entity or package) name in this file.
If several units are present, the first is returned.
None is returned if no unit name is found.
"""
rules = [
('--[^\n]*\n', 'COMMENT'),
('\n+', 'NEWLINE'),
('\w+', 'ID'),
('\s+', 'WHITESPACE'),
('[^\w\n]+', 'NONE'),
]
lx = Lexer(rules, skip_whitespace=False)
lx.input(open(file).read())
window = [None, None, None]
try:
for tok in lx.tokens():
# Implements a simple sliding window looking for
# (entity|package) <name> is
# as 3 consecutive IDs
#
if tok.type == 'ID':
window = window[1:3] + [tok.val.lower()]
if ( window[0] in ('entity', 'package') and
window[2] == 'is'):
return window[1]
except LexerError, err:
return None
def __init__( self, parent = None ):
QsciLexer.__init__( self, parent )
Lexer.__init__( self )
self.editor = parent
return
def __init__( self, parent = None ):
QsciLexerBatch.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "REM "
return
def testParser():
s = """
function quicksort(seznam)
{
x = len(seznam);
if (x <= 1)
{
return seznam;
}
else
{
pivot = pop(seznam,0);
mali = [];
velci = [];
for prvek in seznam
{
if (prvek<pivot)
{
append(mali,prvek);
}
else
{
append(velci,prvek);
};
};
vystup1 = quicksort(mali);
vystup2 = quicksort(velci);
vystup = join (vystup1, pivot, vystup2);
return vystup;
};
};
a = [7,758,6,87,25465,487,654,87,564,687,65];
b = quicksort(a);
print b;
"""
"""s =
function rekurze(bla)
{
if(bla<=0){
return(bla);
};
print bla;
bla = bla - 1;
return( rekurze(bla) );
};
rekurze(10); """
# s = """ bla = 5; function nekdo(){ print("test"); }; nekdo(); print bla;"""
l = Lexer() # timhle si zalozite objekt lexilaniho analyzatoru
l.analyzeString(s) # timhle mu reknete, aby naparsoval string, ktery jste napsali
p = Parser(l) # zalozim si parser a dam mu lexer ze ktereho bude cist tokeny
ast = p.parse() # naparsuju co mam v lexeru a vratim AST
frame = Frame(None)
ffy=FunctionFrame()
print(ast) # zobrazim ten strom
ast.run(frame,ffy)
print frame.locals
def __init__( self, parent = None ):
QsciLexerHTML.__init__( self, parent )
Lexer.__init__( self )
self.streamCommentString = { 'start' : '<!-- ',
'end' : ' -->' }
return
def __init__( self, parent = None ):
QsciLexerMakefile.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "#"
self._alwaysKeepTabs = True
return
def __init__( self, parent = None ):
QsciLexerCSS.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "#"
self.streamCommentString = { 'start' : '/* ',
'end' : ' */' }
return
def __init__( self, parent = None ):
QsciLexerPascal.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "//"
self.streamCommentString = { 'start' : '{ ',
'end' : ' }' }
return
def parseHTML(fileName):
fileObj = open(fileName)
lexer = Lexer(fileName, fileObj)
items = []
while not lexer.isEnd():
item = parseSingleElement(lexer)
items.append(item)
fileObj.close()
return DOMBody(items)
def __init__( self, parent = None ):
QsciLexerCSharp.__init__( self, parent )
Lexer.__init__( self )
self.commentString = "//"
self.streamCommentString = { 'start' : '/* ',
'end' : ' */' }
self.boxCommentString = { 'start' : '/* ',
'middle' : ' * ',
'end' : ' */' }
return
def test_function_property(self):
src = """Item {
property var fnProperty: function (arg1, arg2) { return arg1 + arg2; }
}"""
lexer = Lexer(src)
lexer.tokenize()
qmlclass = QmlClass("Foo")
qmlparser.parse(lexer.tokens, qmlclass)
self.assertEqual(qmlclass.properties[0].name, "fnProperty")
self.assertEqual(qmlclass.properties[0].type, "var")
def test(self):
src = "Item { function foo() {} function bar() {} }"
lexer = Lexer(src)
lexer.tokenize()
qmlclass = QmlClass("Foo")
qmlparser.parse(lexer.tokens, qmlclass)
self.assertEqual(qmlclass.base_name, "Item")
self.assertEqual(qmlclass.functions[0].name, "foo")
self.assertEqual(qmlclass.functions[1].name, "bar")
self.assertEqual(len(qmlclass.functions), 2)
def __init__( self, parent = None, caseInsensitiveKeywords = False ):
QsciLexerCPP.__init__( self, parent, caseInsensitiveKeywords )
Lexer.__init__( self )
self.commentString = "//"
self.streamCommentString = { 'start' : '/* ',
'end' : ' */' }
self.boxCommentString = { 'start' : '/* ',
'middle' : ' * ',
'end' : ' */' }
return
def feed(self, text): lexer = Lexer() lexer.build() # TODO is this a hack self.tokens = lexer.tokens parser = yacc.yacc(module=self) parser.parse(text,lexer=lexer.lexer) self.errors = lexer.errors # print self.classes
def test_var_property(self):
src = """Item {
property var varProperty: { "key1": "value1", "key2": "value2" }
}"""
lexer = Lexer(src)
lexer.tokenize()
qmlclass = QmlClass("Foo")
qmlparser.parse(lexer.tokens, qmlclass)
self.assertEqual(qmlclass.properties[0].name, "varProperty")
self.assertEqual(qmlclass.properties[0].type, "var")
def test_normal_arguments(self):
src = """Item {
function foo(arg1, arg2) {
return arg1 + arg2;
}
}"""
lexer = Lexer(src)
lexer.tokenize()
qmlclass = QmlClass("Foo")
qmlparser.parse(lexer.tokens, qmlclass)
self.assertEqual(qmlclass.functions[0].name, "foo")
self.assertEqual(qmlclass.functions[0].type, "void")
def test_keyword_arguments(self):
src = """Item {
function foo(propertyArgument, signalArgument) {
return propertyArgument + signalArgument;
}
}"""
lexer = Lexer(src)
lexer.tokenize()
qmlclass = QmlClass("Foo")
qmlparser.parse(lexer.tokens, qmlclass)
self.assertEqual(qmlclass.functions[0].name, "foo")
self.assertEqual(qmlclass.functions[0].type, "void")
def test(text):
print
print text
lexer = Lexer()
tokens = lexer.tokenize(text)
print tokens
parser = Parser()
ast = parser.parse(tokens)
print ast
print fmt(ast)
interpreter = Interpreter()
interpreter.interpret(ast, None)
def main():
if(len(sys.argv)>1):
fname=sys.argv[1]
lexer = Lexer(fname)
parser = pg.build()
mypar=parser.parse(lexer.lex())
recprint(mypar,0)
else:
while(1):
lexer=Lexer("hw.scala")
parser=pg.build()
mypar=parser.parse(lexer.lex(raw_input("scaladoll> ")))
# print mypar
recprint(mypar,0)
def __init__(self,afterparse,debug):
parser=self.pg.build()
if(len(sys.argv)>1):
fname=sys.argv[1]
lexer = Lexer(fname,debug)
mypar=parser.parse(lexer.lex())
if(debug): self.recprint(mypar,0)
afterparse(mypar)
else:
while(1):
lexer=Lexer(None,debug)
mypar=parser.parse(lexer.lex(self.readfromprompt()))
if(debug): self.recprint(mypar,0)
afterparse(mypar)
def __init__(self, code, whitespaces=False):
self.lexer = Lexer(code)
self.lexer.lex()
self.curtok = 0
self.start_symbol = None
self.rules = {}
self.whitespaces = whitespaces
import sys
import unittest
from lexer import Lexer, TokenKind
from parser import Parser
file_name = sys.argv[1] if len(sys.argv) > 1 else 'sample.txt'
file = open(file_name, 'r')
content = file.read()
tokens = Lexer(content).tokenize()
parser = Parser()
print(*tokens, sep='\n')
output = None
'''
try:
output = parser.parse(tokens)
except SyntaxError as e:
output = 'Syntax Error at {line}:{col}'.format(line=e.message.line, col=e.message.col)
print(output)
'''
def __init__(self, parent=None):
QsciLexerSQL.__init__(self, parent)
Lexer.__init__(self)
return
from lexer import Lexer
from syntacticalAnalyzer.analyzer import syntacticalAnalyzer
from semanticAnalyzer.analyzer import semanticAnalyzer
lexer = Lexer()
tokens = []
print('enter your command: ')
#input_command = input()
#input_command = 'i want to turn on tv latte in the bedroom'
input_command = 'i want to turn on coffee-machine tea in the kitchen'
#input_command = 'i want to turn in plate degree = 200 in the kitchen'
print(input_command)
divided_command = lexer.get_command(input_command.lower())
lexer.get_tokens(divided_command, tokens)
tokens_types = []
if len(tokens) == 0:
print('wrong command')
else:
synAnalyzer = syntacticalAnalyzer()
words = synAnalyzer.get_sentence(input_command)
syntax_error = synAnalyzer.createSentenceTree(words)
if syntax_error == True:
print('you have a syntax error, please recheck your commnad')
else:
semAnalyzer = semanticAnalyzer()
result = semAnalyzer.room_to_object(tokens)
from lexer import Lexer
from parser import Parser
import os
open("func.txt", "w").close()
open("main.txt", "w").close()
program = open("test.roc").read()
tokens = Lexer(program).tokenize()
for token in tokens:
print(token)
program = Parser(tokens).parse()
program.execute()
print("----------------------------------------")
start = open("roc.cpp").read()
f2 = open("com.cpp", "w")
f2.write(start)
f2.close()
f2 = open("com.cpp", "a")
f2.write(open("func.txt", "r").read() + "\n")
f2.write("int main(){\n" + open("main.txt", "r").read())
f2.write("return 0;\n}\n")
f2.close()
os.system("g++ com.cpp -o com.out")
os.system("./com.out")
"""
def test_next_token(self) -> None:
source = """let five = 5;
let ten = 10;
let add = fn(x, y) {
x + y;
};
let result = add(five, ten);
!-/*5;
5 < 10 > 5;
if (5 < 10) {
return true;
} else {
return false;
}
10 == 10;
10 != 9;
"foobar"
"foo bar"
[1, 2];
{"foo": "bar"}"""
Case = namedtuple("Case",
["expected_token_type", "expected_token_literal"])
tests = [
Case(TokenType.LET, "let"),
Case(TokenType.IDENT, "five"),
Case(TokenType.ASSIGN, "="),
Case(TokenType.INT, "5"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.LET, "let"),
Case(TokenType.IDENT, "ten"),
Case(TokenType.ASSIGN, "="),
Case(TokenType.INT, "10"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.LET, "let"),
Case(TokenType.IDENT, "add"),
Case(TokenType.ASSIGN, "="),
Case(TokenType.FUNCTION, "fn"),
Case(TokenType.LPAREN, "("),
Case(TokenType.IDENT, "x"),
Case(TokenType.COMMA, ","),
Case(TokenType.IDENT, "y"),
Case(TokenType.RPAREN, ")"),
Case(TokenType.LBRACE, "{"),
Case(TokenType.IDENT, "x"),
Case(TokenType.PLUS, "+"),
Case(TokenType.IDENT, "y"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.RBRACE, "}"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.LET, "let"),
Case(TokenType.IDENT, "result"),
Case(TokenType.ASSIGN, "="),
Case(TokenType.IDENT, "add"),
Case(TokenType.LPAREN, "("),
Case(TokenType.IDENT, "five"),
Case(TokenType.COMMA, ","),
Case(TokenType.IDENT, "ten"),
Case(TokenType.RPAREN, ")"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.BANG, "!"),
Case(TokenType.MINUS, "-"),
Case(TokenType.SLASH, "/"),
Case(TokenType.ASTERISK, "*"),
Case(TokenType.INT, "5"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.INT, "5"),
Case(TokenType.LT, "<"),
Case(TokenType.INT, "10"),
Case(TokenType.GT, ">"),
Case(TokenType.INT, "5"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.IF, "if"),
Case(TokenType.LPAREN, "("),
Case(TokenType.INT, "5"),
Case(TokenType.LT, "<"),
Case(TokenType.INT, "10"),
Case(TokenType.RPAREN, ")"),
Case(TokenType.LBRACE, "{"),
Case(TokenType.RETURN, "return"),
Case(TokenType.TRUE, "true"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.RBRACE, "}"),
Case(TokenType.ELSE, "else"),
Case(TokenType.LBRACE, "{"),
Case(TokenType.RETURN, "return"),
Case(TokenType.FALSE, "false"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.RBRACE, "}"),
Case(TokenType.INT, "10"),
Case(TokenType.EQ, "=="),
Case(TokenType.INT, "10"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.INT, "10"),
Case(TokenType.NOT_EQ, "!="),
Case(TokenType.INT, "9"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.STRING, "foobar"),
Case(TokenType.STRING, "foo bar"),
Case(TokenType.LBRACKET, "["),
Case(TokenType.INT, "1"),
Case(TokenType.COMMA, ","),
Case(TokenType.INT, "2"),
Case(TokenType.RBRACKET, "]"),
Case(TokenType.SEMICOLON, ";"),
Case(TokenType.LBRACE, "{"),
Case(TokenType.STRING, "foo"),
Case(TokenType.COLON, ":"),
Case(TokenType.STRING, "bar"),
Case(TokenType.RBRACE, "}"),
Case(TokenType.EOF, "")
]
lexer = Lexer(source)
for test in tests:
token_ = lexer.next_token()
self.assertEqual(token_.type_, test.expected_token_type)
self.assertEqual(token_.literal, test.expected_token_literal)
def parse(self, text):
lex = Lexer(text)
par = Parser(lex)
program = par.parse_program()
self.check_parser_errors(par)
return program
def highlight_line(content):
return highlight(content, Lexer(ensurenl=False), TerminalFormatter())
def main(input_filename):
with open(input_filename) as f:
parser = Parser(Lexer(f.read()))
parser.get_token() # Initialize with first token
parser.n_prog()
elif kind == N.CONST:
self.const(ops)
elif kind == N.EMPTY:
return
else:
self.fail(f'Unexpected opcode {kind}')
def run(self, ast):
if ast.kind != N.PROGRAM:
self.fail('Bad AST tree root type')
for op in ast.ops:
self.run_op(op)
if __name__ == '__main__':
lex = Lexer(
sys.argv[1] if len(sys.argv) > 1 else 'code-samples/hello-world.xp'
)
parser = Parser(lex)
ast = parser.parse()
if '--ast' in sys.argv:
print('AST', ast)
vm = VM()
print('RESULT: ')
vm.run(ast)
def main():
banner = ("""
R O B O T B A S I C
""")
print(banner)
lexer = Lexer()
program = Program()
# Continuously accept user input and act on it until
# the user enters 'EXIT'
while True:
stmt = input('> ')
#print('stmt:',stmt,len(stmt))
try:
tokenlist = lexer.tokenize(stmt)
#print('tokenlist:',tokenlist)
# Execute commands directly, otherwise
# add program statements to the stored
# BASIC program
if len(tokenlist) > 0:
# Exit the interpreter
if tokenlist[0].category == Token.EXIT:
break
# Add a new program statement, beginning
# a line number
elif tokenlist[0].category == Token.UNSIGNEDINT\
and len(tokenlist) > 1:
program.add_stmt(tokenlist)
# Delete a statement from the program
elif tokenlist[0].category == Token.UNSIGNEDINT \
and len(tokenlist) == 1:
program.delete_statement(int(tokenlist[0].lexeme))
# Execute the program
elif tokenlist[0].category == Token.RUN:
try:
program.execute()
except KeyboardInterrupt:
print("Program terminated")
# List the program
elif tokenlist[0].category == Token.LIST:
program.list()
# Save the program to disk
elif tokenlist[0].category == Token.SAVE:
program.save(tokenlist[1].lexeme)
print("Program written to file")
# Load the program from disk
elif tokenlist[0].category == Token.LOAD:
program.load(tokenlist[1].lexeme)
print("Program read from file")
# Delete the program from memory
elif tokenlist[0].category == Token.NEW:
program.delete()
# Unrecognised input
else:
print("Unrecognised input", file=stderr)
for token in tokenlist:
token.print_lexeme()
print(flush=True)
# Trap all exceptions so that interpreter
# keeps running
except Exception as e:
print(e, file=stderr, flush=True)
r = stack.pop()
l = stack.pop()
result = {
'ADD': l + r,
'SUB': l - r,
'MUL': l * r,
'DIV': l // r,
'MOD': l % r,
}
val = result[t]
stack.append(val)
return stack.pop()
if __name__ == '__main__':
lex = Lexer(terminals)
text = '''
a * 13 + b * 100 / 10
'''
tokens = lex.tokenize(text)
rpn_tokens = shunting_yard(tokens)
accs = [acc for _, acc in rpn_tokens]
result = rpn_eval(rpn_tokens, {'a': 10, 'b': 20})
print('Input:', text)
print('RPN:', ' '.join(accs))
print()
print('Result:', result)
print()
print('RPN tokens:')
for t in rpn_tokens:
print(t)
from lexer import Lexer
from semantics import Parser
inputfile = "program.joy"
with open(inputfile) as f:
text_input = f.read()
lexer = Lexer().get_lexer()
tokens = lexer.lex(text_input)
pg = Parser()
pg.parse()
parser = pg.get_parser()
parser.parse(tokens).eval()
from lexer import Lexer
import parser
import sys
import os.path
lexer = Lexer()
# This is the main entry point for code execution of Cookpy code.
# This file takes a single argument, which should point to the Cookpy code you want to run.
# If no argument is given, or if the file doesn't exist an error is raised.
if len(sys.argv) > 1:
if os.path.exists(sys.argv[1]):
sourcefile = open(sys.argv[1])
else:
raise StandardError("Usage Error: The SourceFile Doesn't Exist.")
else:
raise StandardError(
'Usage Error: You Must Provide a Valid Source File to Run.')
# The lexer will read the file and return a list of valid words. Comments will be ignored.
tokens = lexer.languagelexer(sourcefile.read())
sourcefile.close()
# The parser will handle the rest of code execution.
parser.parser(tokens)
# If no error was raised in the parser, we exit with a 'clean' exit code.
from parser import Parser
from code_generator import CodeGen
# text_input = """
# print(6 - 10 + 2);
# """
# Input filename
fname = "input.toy"
# Open input file
with open(fname) as f:
text_input = f.read()
# Initialize new Lexer object
lexer = Lexer().create()
# Tokenize the text input with the lexer object
tokens = lexer.lex(text_input)
# Test print statement
for token in tokens:
print(token)
# Above print statement outputs:
# Token('PRINT', 'print')
# Token('OPEN_PAREN', '(')
# Token('NUMBER', '4')
# Token('SUM', '+')
# Token('NUMBER', '4')
# Token('SUB', '-')
def __init__(self, input):
self.lexer = Lexer(input)
self.current_token = self.lexer.next_token()
self.peek_token = self.lexer.next_token()
from lexer import Lexer
object1 = Lexer().build()
inputFile = open("test1.txt")
inputText = inputFile.read()
inputFile.close()
outputFile = open("test1 result.txt", "w")
object1.input(inputText)
while True:
tok = object1.token()
if not tok:
break
print(tok)
outputFile.write(str(tok) + "\n")
outputFile.close()
from gen_code import CodeGenerator
if __name__ == "__main__":
if len(sys.argv) != 2:
print(f"Usage: {sys.argv[0]} c_file.c")
exit(1)
try:
# for path in os.listdir("tests/stage_1/valid"):
c_file = open(sys.argv[1])
# c_file = open("tests/stage_1/valid/" + path)
src_code = c_file.read()
c_file.close()
# print(src_code)
lexer = Lexer(src_code)
# lexer.print_all_tokens()
parser = Parser(lexer)
ast_root = parser.parse_program()
# print("parsing successful")
# exit(0)
out = open("assembly.s", "w") # sys.stdout
CodeGenerator(ast_root, out).generate_code()
out.close()
# print("Code Generated.\nto get executable use this:")
# print(f"\tgcc -m32 {out.name}")
# print("then execute by ./a.out")
# print("to verify the return value run echo $?")
except Exception as ex:
def __init__(self):
self.accept = True
self.lexer = Lexer()
self.parser = yacc.yacc(module=self, debug=True)
FALSE False
NAME test_Name-name
NUMBER 6956
STRING \"A_String!\"
"""
def test_lexer():
token_string_dict = {}
for line in tokens.split('\n'):
if len(pair := line.split()) == 2:
name, string = line.split()
token_string_dict[name] = string
#print(token_string_dict)
import time
test_lexer = Lexer(input=' ', fpath=grammar_fpath)
for name, string in token_string_dict.items():
#print("Help me"); time.sleep(0.1)
test_lexer.input = list(string)
test_lexer.p = 0
test_lexer.c = test_lexer.input[0]
token = test_lexer.nextToken()
assert token._tname == name
if __name__ == "__main__":
test_lexer()
temp = cur;
cur = prev + cur;
prev = temp;
counter = counter + 1;
}
printf("%d ", cur);
x = x +1;
}
}
"""
from tests.system_tests.code_runner import run_code
from lexer import Lexer
from parser_ import Parser
from compiler.compiler import Compiler
from ast.visualizer import Visualizer
l = Lexer(code2)
p = Parser(l)
c = Compiler(p)
print("=" * 10)
print(c.compile())
print("=" * 10)
l = Lexer(code2)
p = Parser(l)
v = Visualizer(p)
print(run_code(code2))
v.visualize()
from lexer import Lexer
from parser import Parser
from grammar import Grammar
lexer = Lexer('phase_2.vas')
grammar = Grammar("augmented_grammar.txt", "table.txt")
parser = Parser(lexer, grammar)
parser.parse(1)
from tag import Tag
from lexer import Lexer
from analisadorParser import AnalisadorParser
if __name__ == "__main__":
lexer = Lexer('teste.pasc')
parser = AnalisadorParser(lexer)
parser.prog()
parser.lexer.closeFile
print("\n=>Tabela de simbolos:")
lexer.printTS()
lexer.closeFile()
print('\n=> Fim da compilacao')
from lexer import Lexer
from parser import Parser
from evaluator import init_env, evaluate, EvalExeption
try:
lexer = Lexer()
tokens = lexer.tokenize('print(9+2.2*2)')
parser = Parser()
ast = parser.parse(tokens)
#print('==== AST ====\n%s' % ast)
result = evaluate(ast, init_env())
#print('==== RESULT ====\n%s' % result)
except EvalExeption as e:
print('[ERROR]' + str(e))
except KeyboardInterrupt:
print('\nInterrupted')
def main():
parser = argparse.ArgumentParser()
parser.add_argument(
"file",
help=
"File(s) or folder(s) you wanna run the parser on. If no file provided, runs on current folder.",
default=[],
action='append',
nargs='*')
parser.add_argument("-d",
"--debug",
action="count",
help="Debug output (multiple values available)",
default=0)
parser.add_argument('-v',
'--version',
action='version',
version='norminette ' + str(__version__))
#parser.add_argument('-s', '--sentry', action='store_true', default=False)
parser.add_argument(
'--cfile',
action='store',
help="Store C file content directly instead of filename")
parser.add_argument(
'--hfile',
action='store',
help="Store header file content directly instead of filename")
args = parser.parse_args()
registry = Registry()
targets = []
has_err = None
content = None
debug = args.debug
#if args.sentry == True:
#sentry_sdk.init("https://[email protected]/72")
if args.cfile != None or args.hfile != None:
targets = ['file.c'] if args.cfile else ['file.h']
content = args.cfile if args.cfile else args.hfile
else:
args.file = args.file[0]
if args.file == [[]] or args.file == []:
targets = glob.glob("**/*.[ch]", recursive=True)
target = targets.sort()
else:
for arg in args.file:
if os.path.exists(arg) is False:
print(f"'{arg}' no such file or directory")
elif os.path.isdir(arg):
if arg[-1] != '/':
arg = arg + '/'
targets.extend(glob.glob(arg + '**/*.[ch]',
recursive=True))
elif os.path.isfile(arg):
targets.append(arg)
event = []
for target in targets:
if target[-2:] not in [".c", ".h"]:
print(f"{arg} is not valid C or C header file")
else:
with configure_scope() as scope:
scope.set_extra("File", target)
try:
event.append(Event())
#if args.sentry == True:
# proc = Thread(target=timeout, args=(event[-1], 5, ))
# proc.daemon = True
# proc.start()
if content == None:
with open(target) as f:
#print ("Running on", target)
source = f.read()
else:
source = content
lexer = Lexer(source)
tokens = lexer.get_tokens()
context = Context(target, tokens, debug)
registry.run(context, source)
event[-1].set()
if context.errors is not []:
has_err = True
# except (TokenError, CParsingError) as e:
except TokenError as e:
has_err = True
print(target + f": KO!\n\t{colors(e.msg, 'red')}")
event[-1].set()
except CParsingError as e:
has_err = True
print(target + f": KO!\n\t{colors(e.msg, 'red')}")
event[-1].set()
except KeyboardInterrupt as e:
event[-1].set()
sys.exit(1)
sys.exit(1 if has_err else 0)
text += self._expr_src(defn.kids[1], 1)
return text
def _expr_src(self, expr, depth=0):
indent = ' ' * (depth * SrcBuilder._INDENT)
text = indent
if expr.tag == 'APP':
kids_text = ([
self._expr_src(e, depth + 1) for e in expr.kids[0].kids
])
text += f'( {expr.name}\n{"".join(kids_text)}{indent})\n'
elif expr.tag == 'REF':
text += f'{expr.name}\n'
elif expr.tag == 'INT':
text += f'{expr.value}\n'
elif SrcBuilder._TAGS_MAP.get(expr.tag, None):
kids_text = [self._expr_src(e, depth + 1) for e in expr.kids]
text += f'{SrcBuilder._TAGS_MAP[expr.tag]}\n{"".join(kids_text)}'
else:
assert False, f'unhandled tag {expr.tag}'
return text
if __name__ == '__main__':
import sys
from lexer import Lexer
lexer = Lexer(sys.argv[1:])
parser = Parser(lexer)
ast, errors = parser.parse()
print(ast, errors)
def run1():
cstr = "char *(*)() ,"
node = AbstractDeclarator()
node.parse(Lexer(cstr, True), Symbols())
print node.deepstr()
def coordinate(p, token_idx):
last_cr = p.lexer.lexdata.rfind('\n', 0, p.lexpos(token_idx))
if last_cr < 0:
last_cr = -1
column = (p.lexpos(token_idx) - (last_cr))
return (p.lineno(token_idx), column)
class ParseError(Exception):pass
def parse_error(self, msg, coord):
raise ParseError("%s: %s" % (coord, msg))
buffer = Lexer(parse_error)
buffer.run()
tokens = buffer.tokens
precedence = (
('left', 'OR'),
('left', 'EQUAL'),
('left', 'GT', 'LT'),
('left', 'PLUS', 'MINUS'),
('left', 'INC', 'DEC')
)
ath_lexer = Lexer([
(r'(?s)/\*.*?\*/', None), # Multi-line comment
(r'//[^\n]*', None), # Single-line comment
(r'\s+', None), # Whitespace
# Code enclosures
(r'\(', 'BUILTIN'), # Conditional/Call open
(r'\)', 'BUILTIN'), # Conditional/Call close
(r'{', 'BUILTIN'), # Suite open
(r'}', 'BUILTIN'), # Suite close
(r'\[', 'BUILTIN'), # Symbol slice open
(r'\]', 'BUILTIN'), # Symbol slice close
# Separators
(r';', 'BUILTIN'), # Statement separator
(r'\.', 'BUILTIN'), # Lookup operator
(r',', 'BUILTIN'), # Group operator
# Arithmetic in-place operators
(r'\+=', 'BUILTIN'), # Add
(r'-=', 'BUILTIN'), # Sub
(r'\*\*=', 'BUILTIN'), # Pow
(r'\*=', 'BUILTIN'), # Mul
(r'/_=', 'BUILTIN'), # FloorDiv
(r'/=', 'BUILTIN'), # TrueDiv
(r'%=', 'BUILTIN'), # Modulo
# Arithmetic operators
(r'\+', 'BUILTIN'), # Add, UnaryPos
(r'-', 'BUILTIN'), # Sub, UnaryInv
(r'\*\*', 'BUILTIN'), # Pow
(r'\*', 'BUILTIN'), # Mul
(r'/_', 'BUILTIN'), # FloorDiv
(r'/', 'BUILTIN'), # TrueDiv
(r'%', 'BUILTIN'), # Modulo
# Symbol operators
(r'!=!', 'BUILTIN'), # Assert Both
(r'!=\?', 'BUILTIN'), # Assert Left
(r'\?=!', 'BUILTIN'), # Assert Right
(r'~=!', 'BUILTIN'), # Negate Left
(r'!=~', 'BUILTIN'), # Negate Right
(r'~=~', 'BUILTIN'), # Negate Both
# Bitwise shift in-place operators
(r'<<=', 'BUILTIN'), # Bitwise lshift
(r'>>=', 'BUILTIN'), # Bitwise rshift
# Bitwise shift operators
(r'<<', 'BUILTIN'), # Bitwise lshift
(r'>>', 'BUILTIN'), # Bitwise rshift
# Value operators
(r'<=', 'BUILTIN'), # Less than or equal to
(r'<', 'BUILTIN'), # Less than
(r'>=', 'BUILTIN'), # Greater than or equal to
(r'>', 'BUILTIN'), # Greater than
(r'~=', 'BUILTIN'), # Not equal to
(r'==', 'BUILTIN'), # Equal to
# Boolean operators
(r'&&', 'BUILTIN'), # Boolean AND
(r'\|\|', 'BUILTIN'), # Boolean OR
(r'\^\^', 'BUILTIN'), # Boolean XOR
(r'!', 'BUILTIN'), # Boolean NOT
# Statement keywords
(r'DIE', 'BUILTIN'), # Kill symbol
(r'~ATH', 'BUILTIN'), # Loop
(r'print', 'BUILTIN'), # Output
(r'input', 'BUILTIN'), # Input
(r'import', 'BUILTIN'), # Import another file
(r'DEBATE', 'BUILTIN'), # Conditional Consequent
(r'UNLESS', 'BUILTIN'), # Conditional Alternative
(r'EXECUTE', 'BUILTIN'), # Subroutine execution
(r'DIVULGATE', 'BUILTIN'), # Return a symbol
(r'FABRICATE', 'BUILTIN'), # Subroutine declaration
(r'PROCREATE', 'BUILTIN'), # Value declaration
(r'REPLICATE', 'BUILTIN'), # Deep copy
(r'BIFURCATE', 'BUILTIN'), # Split a symbol
(r'AGGREGATE', 'BUILTIN'), # Merge a symbol
# Bitwise in-place operators
(r'&=', 'BUILTIN'), # Bitwise and
(r'\|=', 'BUILTIN'), # Bitwise or
(r'\^=', 'BUILTIN'), # Bitwise xor
# Bitwise operators
(r'&', 'BUILTIN'), # Bitwise and
(r'\|', 'BUILTIN'), # Bitwise or
(r'\^', 'BUILTIN'), # Bitwise xor
(r'~', 'BUILTIN'), # Bitwise not
# Other identifiers
(r'([\'"])[^\1]*?\1', 'STRING'),
(r'(\d+\.(\d*)?|\.\d+)([eE][-+]?\d+)?', 'FLOAT'),
(r'\d+', 'INT'),
(r'[a-zA-Z]\w*', 'SYMBOL'),
])
class Parser:
def __init__(self, fn: str):
"""
:param fn: a file_name str that it will read through
lex: A lexer that will split up all the tokens in the file
tg: The token generator for the Lexer
currtok: The current Token being looked at
ids: a dictionary of all the ids that have been declared
"""
self.lex = Lexer(fn)
self.tg = self.lex.token_generator()
self.currtok = next(self.tg)
self.ids = dict()
self.functions = dict()
def Program(self):
"""
The highest level of the Parser will build up a list of 0 or more function definitions
:return The ast of of the list of function definitions
"""
funcs = list()
while self.currtok[1].name in {"INT", "FLOAT", "BOOLEAN"}:
func = self.FunctionDef()
funcs.append(func)
return Program(funcs)
def FunctionDef(self):
"""
A Function definition figure out its return type its identifier its required parameters and all of the
declarations and statements that are made withing the function body
:return: This will return a abstract syntax tree
:raises: SLUCSyntaxError for missing parentheses around the parameters following the functions identifier
:raises: SLUCSyntaxError for missing Curly braces around the function body
"""
type = self.Type()
key = self.currtok[0]
self.functions[self.currtok[0]] = "first_call"
id = self.primary()
self.functions[key] = type
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
params = self.Params()
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
if self.currtok[1].name == "LCURLY":
self.currtok = next(self.tg)
decs = self.Declarations()
states = self.Statements()
if self.currtok[1].name == "RCURLY":
self.currtok = next(self.tg)
return FunctionDef(type, id, params, decs, states)
raise SLUCSyntaxError(
"ERROR: Missing Right Curly Brace on line {0}".format(
str(self.currtok[2] - 1 - 1)))
raise SLUCSyntaxError(
"ERROR: Missing Left Curly Brace on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError(
"ERROR: Missing Right Paren on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing Left Paren on line {0}".format(
str(self.currtok[2] - 1)))
def Params(self):
"""
This is where all the parameters of a function are put into a list the parameter id's are also added to the
ids dictionary for the parser
:return: This returns the parameters in the form of an abstract syntax tree
"""
params = list()
if self.currtok[1].name in {"INT", "FLOAT", "BOOLEAN"}:
type = self.Type()
self.ids[self.currtok[0]] = type
id = self.primary()
par = Param(type, id)
params.append(par)
while self.currtok[1].name in {"COMMA"}:
self.currtok = next(self.tg)
type = self.Type()
self.ids[self.currtok[0]] = type
id = self.primary()
par = Param(type, id)
params.append(par)
return Params(params)
def Declarations(self):
"""
This will build up a list of declarations using the Declaration function from the Parser
:return: an abstract syntax tree
"""
decs = list()
while self.currtok[1].name in {"INT", "FLOAT", "BOOLEAN"}:
dec = self.Declaration()
decs.append(dec)
return DeclarationsExpr(decs)
def Declaration(self):
"""
This looks to declare identifiers withing the program and adds them to the ids dictionary in the Parser
:return: the declaration as an abstract syntax tree
:raises: SLUCSyntaxError if a semicolon is missing following the declaration
:raises: SLUCSyntaxError if the identifiers has already been declaration
:raises: SLUCSyntaxError if an identifier is not provided
"""
type = self.Type()
if self.currtok[1].name == "IDENT":
self.ids[self.currtok[0]] = type
id = self.primary()
if self.currtok[1].name == "SEMI":
self.currtok = next(self.tg)
return DeclarationExpr(type, id)
raise SLUCSyntaxError("ERROR Missing Semicolon on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR Missing Identifier on line {0}".format(
str(self.currtok[2] - 1)))
def Type(self):
"""
This is used to get a type for function returns, params, declarations
:return: an abstract syntax tree
:raises: if we are not given a valid type
"""
if self.currtok[1].name in {"INT", "FLOAT", "BOOLEAN"}:
type = self.currtok[0]
self.currtok = next(self.tg)
return type
raise SLUCSyntaxError("ERROR: Unexpected token {0} on line {1}".format(
self.currtok[1], str(self.currtok[2] - 1)))
def Statements(self):
"""
Used for when there is zero or more statements it builds up a list of statments
:return: an abstract syntax tree
"""
states = list()
while self.currtok[1].name in {
"SEMI", "LCURLY", "IDENT", "if", "print", "while", "return"
}:
state = self.Statement()
states.append(state)
return StatementsStmt(states)
def Statement(self):
"""
leads to the correct statement token
:return: the ast that matches with the statement token
:raises: SLUCSyntaxError If not a valid statement token is given it
"""
if self.currtok[1].name == "SEMI":
self.currtok = next(self.tg)
return semicolon()
if self.currtok[1].name == "LCURLY":
return self.Block()
if self.currtok[1].name == "IDENT":
if self.functions.get(self.currtok[0]) is None:
return self.Assignment()
else:
return self.FunctionCall()
if self.currtok[1].name == "if":
return self.IfStatement()
if self.currtok[1].name == "print":
return self.PrintStmt()
if self.currtok[1].name == "while":
return self.WhileStatement()
if self.currtok[1].name == "return":
return self.ReturnStmt()
raise SLUCSyntaxError("ERROR: Unexpected token {0} on line {1}".format(
self.currtok[1], str(self.currtok[2] - 1)))
def ReturnStmt(self):
"""
With the key word return it followed by an expression and semi colon
:return: the abstract syntax tree
:raises: SLUCSyntaxError is a missing semicolon following the return statement
"""
self.currtok = next(self.tg)
express = self.Expression()
if self.currtok[1].name == "SEMI":
self.currtok = next(self.tg)
return returnStmt(express)
raise SLUCSyntaxError("ERROR: Missing Semicolon on line {0}".format(
str(self.currtok[2] - 1)))
def Block(self):
"""
A set of 0 or more statements withing curly braces
:return: the abstract syntax tree
:raises: SLUCSyntaxError is a missing a right curly brace to close the block
"""
self.currtok = next(self.tg)
statements = self.Statements()
if self.currtok[1].name == "RCURLY":
self.currtok = next(self.tg)
return BlockExpr(statements.get_lst())
raise SLUCSyntaxError("ERROR: Right Curly Brace on line {0}".format(
str(self.currtok[2] - 1)))
def Assignment(self):
"""
Setting a value to an identifier that is in the ids dictionary
:return: the abstract syntax tree
:raises: SLUCSyntaxError is a missing semicolon following the assigned value
:raises: SLUCSyntaxError is a missing an (=) following the identifier
"""
id = self.primary()
if self.currtok[1].name == "DECLERATION":
self.currtok = next(self.tg)
if self.functions.get(self.currtok[0]) is not None:
express = self.FunctionCall()
return assignmentStmt(id, express)
else:
express = self.Expression()
if self.currtok[1].name == "SEMI":
self.currtok = next(self.tg)
return assignmentStmt(id, express)
raise SLUCSyntaxError(
"ERROR: Missing Semicolon on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing assignment on line {0}".format(
str(self.currtok[2] - 1)))
def IfStatement(self):
"""
Given the key word if has an expression as a condition for the if then win a set of parentheses
and followed by an statement and can end with the key world else followed by a statement
:return: an abstract syntax tree
:raises: SLUCSyntaxError missing a left parenthesise for following the key word if
:raises: SLUCSyntaxError missing a right parenthesise for following the expression
"""
self.currtok = next(self.tg)
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
express = self.Expression()
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
state = self.Statement()
if self.currtok[1].name == "else":
self.currtok = next(self.tg)
state2 = self.Statement()
return ifelseStmt(express, state, state2)
else:
return ifStmt(express, state)
raise SLUCSyntaxError(
"ERROR: Missing right paren on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing left paren on line {0}".format(
str(self.currtok[2] - 1)))
def WhileStatement(self):
"""
Given the key word while has an expression as a condition for the if then within a set of parentheses and
followed by a statement
:return: an abstract syntax tree
:raises: SLUCSyntaxError missing a left parenthesise for following the key word while
:raises: SLUCSyntaxError missing a right parenthesise for following the expression
"""
self.currtok = next(self.tg)
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
express = self.Expression()
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
state = self.Statement()
return whileStmt(express, state)
raise SLUCSyntaxError(
"ERROR: Missing right paren on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing left paren on line {0}".format(
str(self.currtok[2] - 1)))
def PrintStmt(self):
"""
This takes a list of print arguments separated by commas and surrounded by parentheses all following the key
word print
:return: an abstract syntax tree
:raises: SLUCSyntaxError missing a left parenthesise for following the key word print
:raises: SLUCSyntaxError missing a right parenthesise for following the set of print arguments or a comma
"""
args = list()
self.currtok = next(self.tg)
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
arg = self.PrintArg()
args.append(arg)
while self.currtok[1].name == "COMMA":
self.currtok = next(self.tg)
arg = self.PrintArg()
args.append(arg)
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
if self.currtok[1].name == "SEMI":
return printstmtStmt(args)
raise SLUCSyntaxError(
"ERROR: Missing right semicolon line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError(
"ERROR: Missing right paren or a comma line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing left paren on line {0}".format(
str(self.currtok[2] - 1)))
def PrintArg(self):
"""
The items that are found within a print statements can be strings expressions or function calls
:return: an abstract syntax tree
"""
if self.currtok[1].name == "STRING_LIT":
arg = String_LitExpr(self.currtok[0])
self.currtok = next(self.tg)
return printArg(arg)
if self.functions.get(self.currtok[0]) is not None:
arg = self.FunctionCall()
return printArg(arg)
arg = self.Expression()
return printArg(arg)
def FunctionCall(self):
"""
If a function is called it is the list of required params separated by commas all surrounded by
parentheses
:return: an abstract syntax tree
:raises: SLUCSyntaxError missing a separating comma between two parameters
:raises: SLUCSyntaxError missing a left parenthesise for following the key word print
:raises: SLUCSyntaxError missing a right parenthesise for following the set of print arguments or a comma
"""
id = self.currtok[0]
self.currtok = next(self.tg)
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
params = list()
while self.currtok[1].name in {"BOOL", "INTLIT", "IDENT", "REAL"}:
param = self.Expression()
if self.currtok[1].name != "RPAREN":
if self.currtok[1].name == "COMMA":
self.currtok = next(self.tg)
else:
raise SLUCSyntaxError(
"ERROR: Missing comma on line {0}".format(
str(self.currtok[2] - 1)))
params.append(param)
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
return FuncIDExpr(id, params)
raise SLUCSyntaxError(
"ERROR: Missing right paren on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Missing left paren on line {0}".format(
str(self.currtok[2] - 1)))
def Expression(self, paren=False):
"""
One conjunction expression possibly matched more conjunctions expression separated by ||
:return: an abstract syntax tree
"""
left = self.Conjunction(paren)
while self.currtok[1].name == "OR":
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Conjunction()
left = BinaryExpr(op, left, right, paren)
return left
def Conjunction(self, paren=False):
"""
One equality expression possibly matched more equality expression separated by &&
:return: an abstract syntax tree
"""
left = self.Equality(paren)
while self.currtok[1].name == "AND":
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Equality(paren)
left = BinaryExpr(op, left, right, paren)
return left
def Equality(self, paren=False):
"""
One relation expression possibly matched one more relation expression separated by == or !=
:return: an abstract syntax tree
"""
left = self.Relation(paren)
if self.currtok[1].name in {"EQULITY", "NOTEQUAL"}:
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Relation(paren)
left = BinaryExpr(op, left, right, paren)
return left
def Relation(self, paren=False):
"""
One adddition expression possibly matched one more adddition expression separated by > , <, >= or <=
:return: an abstract syntax tree
"""
left = self.Addition(paren)
if self.currtok[1].name in {"GREATERTHAN", "LESSTHAN", "LET", "GET"}:
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Addition(paren)
left = BinaryExpr(op, left, right, paren)
return left
def Addition(self, paren=False):
"""
One term expression possibly matched more term expression separated by + or -
:return: an abstract syntax tree
"""
left = self.Term(paren)
while self.currtok[1].name in {"PLUS", "MINUS"}:
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Term(paren)
left = BinaryExpr(op, left, right, paren)
return left
def Term(self, paren=False):
"""
One Factor expression possibly matched more Factor expression separated by *, / or %
:return: an abstract syntax tree
"""
left = self.Factor()
while self.currtok[1].name in {"TIMES", "DIVISION", "MOD"}:
op = self.currtok[0]
self.currtok = next(self.tg)
right = self.Factor()
left = BinaryExpr(op, left, right, paren)
return left
def Factor(self):
"""
A primary expression that is preceded a !, - or nothing at all
:return: an abstract syntax tree
"""
if self.currtok[1].name in {"MINUS", "NOT"}:
op = self.currtok[0]
self.currtok = next(self.tg)
prime = self.primary()
return Factor(op, prime)
return self.primary()
def primary(self):
"""
Gets the back an identifier, an intlit, boolean real or another expression that is surrounded by parentheses
:return: an abstract syntax tree
:raises: SLUCSyntaxError if an identifier that was passed in is not been declared in the ids dictionary or
function dictionary
:raises: SLUCSyntaxError if a right parenthesise is missing from the cases when an (expression) occurs
:raises SLUCSyntaxError if an invalid token has been passed into the primary
"""
if self.currtok[1].name == "IDENT":
tmp = self.currtok
if self.functions.get(
tmp[0]) is not "first_call" and self.functions.get(
tmp[0]) is not None:
func = self.FunctionCall()
return func
elif self.ids.get(tmp[0]) is not None or self.functions.get(
tmp[0]) is "first_call":
self.currtok = next(self.tg)
return IDExpr(tmp[0])
else:
raise SLUCSyntaxError(
"ERROR: Given ID {0} was not declared above on line {1}".
format(tmp[0], str(self.currtok[2] - 1)))
if self.currtok[1].name == "INTLIT":
tmp = self.currtok
self.currtok = next(self.tg)
return IntLitExpr(tmp[0])
if self.currtok[1].name == "BOOL":
tmp = self.currtok[0]
self.currtok = next(self.tg)
return BoolExpr(tmp[0])
if self.currtok[1].name == "REAL":
tmp = self.currtok
self.currtok = next(self.tg)
return Real_Expr(tmp[0])
if self.currtok[1].name == "STRING_LIT":
tmp = self.currtok
self.currtok = next(self.tg)
return String_LitExpr(tmp[0])
if self.currtok[1].name == "LPAREN":
self.currtok = next(self.tg)
tree = self.Expression(True)
if self.currtok[1].name == "RPAREN":
self.currtok = next(self.tg)
return tree
else:
raise SLUCSyntaxError(
"ERROR: Missing right paren on line {0}".format(
str(self.currtok[2] - 1)))
raise SLUCSyntaxError("ERROR: Unexpected token {0} on line {1}".format(
self.currtok[1], str(self.currtok[2] - 1)))
def test_next_token():
input = """let five = 5;
let ten = 10;
let add = fn(x, y){
x + y;
};
let result = add(five, ten);
!-/*5;
5 < 10 > 5;
if 5 == 10 != 8 {
return true;
} else {
return false;
}
# this is a comment it should all be ignored
#
not_a_comment; # comments again let return {}
a_b;
"foobar"
"foo bar"
[1, 2];
{5: 2};
for(x in v){break;};
while(true){continue;};
"""
tests = [
(tokens.LET, "let"),
(tokens.IDENT, "five"),
(tokens.ASSIGN, "="),
(tokens.INT, "5"),
(tokens.SEMICOLON, ";"),
(tokens.LET, "let"),
(tokens.IDENT, "ten"),
(tokens.ASSIGN, "="),
(tokens.INT, "10"),
(tokens.SEMICOLON, ";"),
(tokens.LET, "let"),
(tokens.IDENT, "add"),
(tokens.ASSIGN, "="),
(tokens.FUNCTION, "fn"),
(tokens.LPAREN, "("),
(tokens.IDENT, "x"),
(tokens.COMMA, ","),
(tokens.IDENT, "y"),
(tokens.RPAREN, ")"),
(tokens.LBRACE, "{"),
(tokens.IDENT, "x"),
(tokens.PLUS, "+"),
(tokens.IDENT, "y"),
(tokens.SEMICOLON, ";"),
(tokens.RBRACE, "}"),
(tokens.SEMICOLON, ";"),
(tokens.LET, "let"),
(tokens.IDENT, "result"),
(tokens.ASSIGN, "="),
(tokens.IDENT, "add"),
(tokens.LPAREN, "("),
(tokens.IDENT, "five"),
(tokens.COMMA, ","),
(tokens.IDENT, "ten"),
(tokens.RPAREN, ")"),
(tokens.SEMICOLON, ";"),
(tokens.BANG, "!"),
(tokens.MINUS, "-"),
(tokens.SLASH, "/"),
(tokens.ASTERISK, "*"),
(tokens.INT, "5"),
(tokens.SEMICOLON, ";"),
(tokens.INT, "5"),
(tokens.LT, "<"),
(tokens.INT, "10"),
(tokens.GT, ">"),
(tokens.INT, "5"),
(tokens.SEMICOLON, ";"),
(tokens.IF, "if"),
(tokens.INT, "5"),
(tokens.EQ, "=="),
(tokens.INT, "10"),
(tokens.NOT_EQ, "!="),
(tokens.INT, "8"),
(tokens.LBRACE, "{"),
(tokens.RETURN, "return"),
(tokens.TRUE, "true"),
(tokens.SEMICOLON, ";"),
(tokens.RBRACE, "}"),
(tokens.ELSE, "else"),
(tokens.LBRACE, "{"),
(tokens.RETURN, "return"),
(tokens.FALSE, "false"),
(tokens.SEMICOLON, ";"),
(tokens.RBRACE, "}"),
(tokens.IDENT, "not_a_comment"),
(tokens.SEMICOLON, ";"),
(tokens.IDENT, "a_b"),
(tokens.SEMICOLON, ";"),
(tokens.STRING, "foobar"),
(tokens.STRING, "foo bar"),
(tokens.LBRACKET, "["),
(tokens.INT, "1"),
(tokens.COMMA, ","),
(tokens.INT, "2"),
(tokens.RBRACKET, "]"),
(tokens.SEMICOLON, ";"),
(tokens.LBRACE, "{"),
(tokens.INT, "5"),
(tokens.COLON, ":"),
(tokens.INT, "2"),
(tokens.RBRACE, "}"),
(tokens.SEMICOLON, ";"),
(tokens.FOR, "for"),
(tokens.LPAREN, "("),
(tokens.IDENT, "x"),
(tokens.IN, "in"),
(tokens.IDENT, "v"),
(tokens.RPAREN, ")"),
(tokens.LBRACE, "{"),
(tokens.BREAK, "break"),
(tokens.SEMICOLON, ";"),
(tokens.RBRACE, "}"),
(tokens.SEMICOLON, ";"),
(tokens.WHILE, "while"),
(tokens.LPAREN, "("),
(tokens.TRUE, "true"),
(tokens.RPAREN, ")"),
(tokens.LBRACE, "{"),
(tokens.CONTINUE, "continue"),
(tokens.SEMICOLON, ";"),
(tokens.RBRACE, "}"),
(tokens.SEMICOLON, ";"),
(tokens.EOF, ""),
]
l = Lexer(input)
i = 0
for expected_type, expected_literal in tests:
tok: tokens.Token = l.next_token()
assert tok.typ == expected_type, f"Token type wrong: {i}. got {tok.typ}, wanted {expected_type}. token: {tok}"
assert tok.literal == expected_literal, f"Token literal wrong: {i}"
i += 1