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Add if statement

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Signed-off-by: CHatingPython <chatingpython@gmail.com>
This commit is contained in:
CHatingPython
2026-05-31 17:29:17 +02:00
committed by CHatingPython
parent 646d185d40
commit 91ef7f01a4
12 changed files with 170 additions and 44 deletions
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furc/src/front/parser.cpp
+46 -13
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@@ -1,6 +1,6 @@
#include "furc/front/parser.hpp"
#include "furc/ast/declaration.hpp"
// #include "furc/ast/declaration.hpp" // IWYU pragma: keep
#include <fstream>
#include <iostream>
@@ -55,7 +55,7 @@ ast::declaration_node_h parser::parse_declaration() {
if (peek.has_error()) return peek;
switch (peek->type) {
case token_t::Lbrace: {
ast::function_body_h body = parse_body();
ast::body_h body = parse_body();
if (body.has_error()) return body;
return ast::function_definition_node_h{ first.location(), m_arena, *name, std::move(body) };
}
@@ -91,16 +91,49 @@ ast::statement_node_h parser::parse_statement() {
if (tok.has_error()) return tok;
switch (tok->type) {
case token_t::Keyword: {
auto tok = next_token();
if (peek_token()->type == token_t::Semicolon) {
next_token();
return ast::return_statement_node_h{ tok.location(), m_arena };
}
switch (tok->value.keyword) {
case keyword_token::Return: {
auto tok = next_token();
if (peek_token()->type == token_t::Semicolon) {
next_token();
return ast::return_statement_node_h{ tok.location(), m_arena };
}
auto value = parse_expression();
auto err = eat_token(token_t::Semicolon);
if (err.has_error()) return err;
return ast::return_statement_node_h{ tok.location(), m_arena, std::move(value) };
auto value = parse_expression();
auto err = eat_token(token_t::Semicolon);
if (err.has_error()) return err;
return ast::return_statement_node_h{ tok.location(), m_arena, std::move(value) };
}
case keyword_token::If: {
auto tok = next_token();
auto err = eat_token(token_t::Lparen);
if (err.has_error()) return err;
auto cond = parse_expression();
err = eat_token(token_t::Rparen);
if (err.has_error()) return err;
auto then = parse_statement();
if (then.has_error()) return then;
if (peek_token().present() && peek_token()->type == token_t::Keyword &&
peek_token()->value.keyword == keyword_token::Else) {
next_token();
return ast::if_statement_node_h{ tok.location(),
m_arena,
std::move(cond),
std::move(then),
std::move(parse_statement()) };
}
return ast::if_statement_node_h{ tok.location(), m_arena, std::move(cond), std::move(then) };
}
case keyword_token::None:
case keyword_token::Func:
default: break;
}
}
default: break;
}
@@ -328,8 +361,8 @@ ast::expression_node_h parser::parse_expression_rhs(ast::expression_node_h&& ini
return lhs;
}
ast::function_body_h parser::parse_body() {
ast::function_body body;
ast::body_h parser::parse_body() {
ast::body body;
token_handle<> begin = eat_token(token_t::Lbrace);
if (begin.has_error()) return begin;