Max Wash
0bb4a4284c
this parser now only handles if-else statements, and uses the state init callback argument to receive any pre-existing inline expressions
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
#include "../node.h"
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#include "expr.h"
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#include <blue/object/string.h>
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#include <ivy/lang/lex.h>
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#include <ivy/lang/operator.h>
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#include <stdio.h>
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struct token_parse_result stmt_parse_if(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct expr_parser_state *state
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= parser_get_state(ctx, struct expr_parser_state);
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if (state->s_sub_type == EXPR_SUBTYPE_KEYWORD_ARG) {
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/* keyword messages have a higher precedence than inline conditionals, so
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* treat this as a statement terminator. */
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struct token_parse_result result
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= expr_finalise_and_return(ctx, state);
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result.r_flags |= PARSE_REPEAT_TOKEN;
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return result;
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}
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struct ivy_ast_node *expr = NULL;
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struct token_parse_result result
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= expr_finalise(ctx, state, IVY_PRECEDENCE_IF_ELSE, &expr);
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if (result.r_status != IVY_OK) {
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return result;
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}
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state->s_prev_token = IVY_KW_IF;
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if (b_queue_empty(&state->s_operator_stack) && b_queue_empty(&state->s_output_queue)) {
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parser_pop_state(ctx, 0);
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}
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/* if expr is NULL, this is an if-then-else-end statement,
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* otherwise, this is an expr-if-else-expr. */
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struct cond_group_parser_state *cond
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= (struct cond_group_parser_state *)parser_push_state(
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ctx, IVY_AST_COND_GROUP, (uintptr_t)expr);
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return PARSE_RESULT(IVY_OK, PARSE_REPEAT_TOKEN);
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}
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struct token_parse_result stmt_parse_then(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct expr_parser_state *state
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= parser_get_state(ctx, struct expr_parser_state);
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/* treat this as a statement terminator. */
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struct token_parse_result result = expr_finalise_and_return(ctx, state);
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result.r_flags |= PARSE_REPEAT_TOKEN;
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return result;
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}
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struct token_parse_result stmt_parse_else(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct expr_parser_state *state
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= parser_get_state(ctx, struct expr_parser_state);
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/* treat this as a statement terminator. */
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struct token_parse_result result = expr_finalise_and_return(ctx, state);
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result.r_flags |= PARSE_REPEAT_TOKEN;
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return result;
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}
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struct token_parse_result stmt_parse_end(
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struct ivy_parser *ctx, struct ivy_token *tok)
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{
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struct expr_parser_state *state
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= parser_get_state(ctx, struct expr_parser_state);
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/* treat this as a statement terminator. */
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struct token_parse_result result = expr_finalise_and_return(ctx, state);
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result.r_flags |= PARSE_REPEAT_TOKEN;
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return result;
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} |