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Adding error handling support

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This commit is contained in:
Anthony Debucquoy
2025-04-28 15:38:42 +02:00
parent d73a5be3f5
commit e2e058c8ac
4 changed files with 119 additions and 18 deletions
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56
spf.py
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@@ -8,6 +8,7 @@ import lark
import sys
from enum import Enum
from modules.Variables import Variables
from modules.errors import *
class SPFInterpreter(lark.visitors.Interpreter):
def __init__(self, trace=False):
@@ -24,11 +25,19 @@ class SPFInterpreter(lark.visitors.Interpreter):
type = el.children[0].value
name = el.children[1].value
old = self.variables.variables.copy()
self.variables.declare(type, name)
try:
self.variables.declare(type, name)
except SPFException as e:
e.errorline = el.meta.line
raise e
target = self.visit_children(el.children[2])[0]
for i in target:
self.variables.assign(name, i)
try:
self.variables.assign(name, i)
except SPFException as e:
e.errorline = el.meta.line
raise e
self.visit_children(el.children[3])
self.variables.variables = old.copy()
@@ -40,20 +49,33 @@ class SPFInterpreter(lark.visitors.Interpreter):
def append(self, el):
(_, toadd, var) = self.visit_children(el);
var_val = self.variables.get(var.value)
try:
var_val = self.variables.get(var.value)
except SPFException as e:
e.errorline = el.meta.line
raise e
var_val.append(toadd)
def declaration(self, el):
type = el.children[0].value
name = el.children[1].value
value = self.visit_children(el.children[3])[0] if len(el.children) >= 3 else None
self.variables.declare(type, name, value)
try:
self.variables.declare(type, name, value)
except SPFException as e:
e.errorline = el.meta.line
raise e
def assignation(self, el):
name = el.children[0].value
assert el.children[1].value == "=" and el.children[2].data == "expression", "Unexpected"
value = self.visit_children(el.children[2])[0]
self.variables.assign(name, value)
try:
self.variables.assign(name, value)
except SPFException as e:
e.errorline = el.meta.line
raise e
def expression(self, el):
return self.visit_children(el)[0]
@@ -108,7 +130,6 @@ class SPFInterpreter(lark.visitors.Interpreter):
def priority(self, el):
result = self.visit_children(el)
print(result)
if len(result) < 2:
return result[0]
elif result[0].type == "SIZE_OP":
@@ -120,13 +141,22 @@ class SPFInterpreter(lark.visitors.Interpreter):
def list_get(self, el):
result = self.visit_children(el)
return result[0][result[1] - 1] # Index start at 1 (like lua)
try:
return result[0][result[1] - 1] # Index start at 1 (like lua)
except IndexError:
e = SPFIndexError(result[0], result[1])
e.errorline = el.meta.line
raise e
def finalterm(self, el):
return self.visit_children(el)[0]
def variable(self, el):
return self.variables.get(el.children[0].value)
try:
return self.variables.get(el.children[0].value)
except SPFException as e:
e.errorline = el.meta.line
raise e
def test(self,el):
old = self.variables.variables.copy()
@@ -167,11 +197,16 @@ def main():
args = arg_parser.parse_args()
with open("spf.lark") as grammar:
spf_parser = lark.Lark(grammar, parser="lalr", strict=True, debug=True)
spf_parser = lark.Lark(grammar, parser="lalr", strict=True, debug=True, propagate_positions=True)
with open(args.spf_file) as spf_input:
program = spf_input.read()
parsed = spf_parser.parse(program)
try:
parsed = spf_parser.parse(program)
except lark.UnexpectedInput as u:
e = SPFSyntaxError()
e.errorline = u.line
raise e
if args.pretty:
print(parsed.pretty())
@@ -183,7 +218,6 @@ def main():
if args.dump:
interpreter.dump()
if __name__ == "__main__":
main()