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Add lambdas.

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This commit is contained in:
Christoffer Lerno
2023-01-23 00:41:05 +01:00
committed by Christoffer Lerno
parent c9e1e2d763
commit b508a43f8f
47 changed files with 1116 additions and 487 deletions
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47
src/compiler/parse_expr.c
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@@ -335,6 +335,50 @@ static bool parse_param_path(ParseContext *c, DesignatorElement ***path)
}
}
static Expr *parse_lambda(ParseContext *c, Expr *left)
{
assert(!left && "Unexpected left hand side");
Expr *expr = EXPR_NEW_TOKEN(EXPR_LAMBDA);
advance_and_verify(c, TOKEN_FN);
Decl *func = decl_calloc();
func->decl_kind = DECL_FUNC;
func->visibility = VISIBLE_LOCAL;
func->func_decl.generated_lambda = NULL;
TypeInfo *return_type = NULL;
if (!tok_is(c, TOKEN_LPAREN))
{
ASSIGN_TYPE_OR_RET(return_type, parse_optional_type(c), poisoned_expr);
}
CONSUME_OR_RET(TOKEN_LPAREN, poisoned_expr);
Decl **params = NULL;
Decl **decls = NULL;
Variadic variadic = VARIADIC_NONE;
int vararg_index = -1;
if (!parse_parameters(c, VISIBLE_LOCAL, &decls, NULL, &variadic, &vararg_index, PARAM_PARSE_LAMBDA)) return false;
CONSUME_OR_RET(TOKEN_RPAREN, poisoned_expr);
Signature *sig = &func->func_decl.signature;
sig->vararg_index = vararg_index < 0 ? vec_size(decls) : vararg_index;
sig->params = decls;
sig->rtype = return_type ? type_infoid(return_type) : 0;
sig->variadic = variadic;
if (!parse_attributes(c, &func->attributes)) return poisoned_expr;
if (tok_is(c, TOKEN_IMPLIES))
{
ASSIGN_ASTID_OR_RET(func->func_decl.body,
parse_short_body(c, func->func_decl.signature.rtype, false), poisoned_expr);
}
else if (tok_is(c, TOKEN_LBRACE))
{
ASSIGN_ASTID_OR_RET(func->func_decl.body, parse_compound_stmt(c), poisoned_expr);
}
else
{
SEMA_ERROR_HERE("Expected the beginning of a block or a short statement.");
}
expr->lambda_expr = func;
return expr;
}
Expr *parse_vasplat(ParseContext *c)
{
Expr *expr = EXPR_NEW_TOKEN(EXPR_VASPLAT);
@@ -736,7 +780,7 @@ static Expr *parse_call_expr(ParseContext *c, Expr *left)
SEMA_ERROR_LAST("Expected an ending ')'. Did you forget a ')' before this ';'?");
return poisoned_expr;
}
if (!parse_parameters(c, VISIBLE_LOCAL, &body_args, NULL, NULL, NULL, true)) return poisoned_expr;
if (!parse_parameters(c, VISIBLE_LOCAL, &body_args, NULL, NULL, NULL, PARAM_PARSE_CALL)) return poisoned_expr;
}
if (!tok_is(c, TOKEN_RPAREN))
{
@@ -1781,6 +1825,7 @@ ParseRule rules[TOKEN_EOF + 1] = {
[TOKEN_AT_IDENT] = { parse_identifier, NULL, PREC_NONE },
//[TOKEN_HASH_TYPE_IDENT] = { parse_type_identifier, NULL, PREC_NONE }
[TOKEN_FN] = { parse_lambda, NULL, PREC_NONE },
[TOKEN_CT_SIZEOF] = { parse_ct_sizeof, NULL, PREC_NONE },
[TOKEN_CT_ALIGNOF] = { parse_ct_call, NULL, PREC_NONE },
[TOKEN_CT_DEFINED] = { parse_ct_call, NULL, PREC_NONE },