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Compylateur
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Ajout de statments

This commit is contained in:
Shadow15510 2020-06-28 15:17:32 +02:00
parent 7fe405270e
commit d1ebcb39cc
1 changed files with 26 additions and 16 deletions
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42
Compylateur.py
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@ -63,7 +63,8 @@ def AST_gen(node, tab = 0):
# --- Main function --- #
def lexer(prgm_src):
def lexer(prgm_src):
prgm_src = prgm_src.replace("\n", " ")
token = {
"(":"LPAR",
")":"RPAR",
@ -74,7 +75,6 @@ def lexer(prgm_src):
"^":"EXP",
",":"COMMA",
"=":"EQUAL",
"\n":"NLINE"
"est supérieur à":"SUP", ">":"SUP", "est plus grand que":"SUP",
"est supérieur ou égal à":"SUP_EGA", ">=":"SUP_EGA", "≥":"SUP_EGA", "est plus grand ou égal à":"SUP_EGA",
"est inférieur à":"INF", "<":"INF", "≤":"INF_EGA", "est plus petit que":"INF",
@ -84,10 +84,12 @@ def lexer(prgm_src):
"ou":"OR",
"et":"AND",
"affecter à":"AFFECT", "prend la valeur":"TAKE", "est initialisé à":"TAKE",
"afficher":"DISPLAY",
"demander la valeur de":"REQUEST", "on demande la valeur de":"REQUEST", "saisir la valeur de":"REQUEST", "saisir":"REQUEST", "à l'utilisateur":"USER", "la valeur":"VALUE",
"fin":"END", "fin si":"END", "fin pour":"END", "fin tant que":"END", "faire":"DO",
"fin si":"END_IF", "fin pour":"END_FOR", "fin tant que":"END_WHILE", "fin tantque":"END_WHILE", "faire":"DO",
"si":"IF", "alors":"THEN", "sinon, si":"ELIF", "sinon":"ELSE",
"pour":"FOR", "allant de":"INTER_ST", "variant entre":"INTER_ST", "variant de":"INTER_ST", "à":"INTER_ED", "jusqu'à":"INTER_ED"}
"pour":"FOR", "allant de":"INTER_ST", "variant entre":"INTER_ST", "variant de":"INTER_ST", "à":"INTER_ED", "jusqu'à":"INTER_ED",
"tant que":"WHILE", "tantque":"WHILE"}
for i in {"=", "<", "<=", ">", ">=", "+", "-", "/", "*", "^", "(", ")", "[", "]", "{", "}", '"', "\n", ",", ";"}:
prgm_src = prgm_src.replace(i, " " + i + " ")
@ -251,14 +253,16 @@ class Parser():
def block(self):
ast = Node("Block", "")
while self.token_ahead.type in ("AFFECT," "REQUEST", "VAR", "IF", "FOR"): ast.add_node(self.statement())
while self.token_ahead.type in ("AFFECT," "REQUEST", "VAR", "DISPLAY", "IF", "FOR", "WHILE"): ast.add_node(self.statement())
return ast
def statement(self):
if self.token_ahead.type in ("AFFECT", "REQUEST", "VAR"): return self.assignement()
elif self.token_ahead.type == "DISPLAY": return self.display()
elif self.token_ahead.type == "IF": return self.statement_if()
elif self.token_ahead.type == "FOR": return self.statement_for()
elif self.token_ahead.type == "WHILE": return self.statement_while()
def assignement(self):
value = None
@ -278,8 +282,13 @@ class Parser():
if value: return Node("Assignement","", Node("Variable",var.value), value)
else: return Node("User's request", "", Node("Variable", var.value))
def display(self):
self.expect()
text = self.expect("TEXT", "VAR", "NUM")
return Node("Display", text.value)
def statement_if(self):
self.expect("IF")
self.expect()
cond_1 = self.condition()
self.expect("THEN", "COMMA", "DO")
block_1 = self.block()
@ -294,11 +303,11 @@ class Parser():
else:
block_2 = self.block()
ast.add_node(Node("Statement", "else", block_2))
self.expect("END")
self.expect("END_IF")
return ast
def statement_for(self):
self.expect("FOR")
self.expect()
it_var = self.expect("VAR")
self.expect("INTER_ST")
start_value = self.expr()
@ -307,22 +316,23 @@ class Parser():
self.expect("COMMA", "DO")
ast = Node("Statement", "for", Node("Incremented variable", it_var.value), Node("Start value", start_value.value), Node("End value", end_value.value))
ast.add_node(self.block())
self.expect("END")
self.expect("END_FOR")
return ast
def statement_while(self):
self.expect()
condition = self.condition()
self.expect("COMMA", "DO")
block = self.block()
self.expect("END_WHILE")
return Node("Statement", "while", condition, block)
# --- Secondary functions --- #
def parser(l_token):
par = Parser(l_token)
ast = Node("Programm", "")
ast.add_node(par.statement_for())
ast.add_node(par.statement())
return ast