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lang: ast: implement single-expression message handler parsing

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max 🍓
2024-11-28 16:57:10 +00:00
parent 7530dd36a2
commit 4304b94491
1 changed files with 49 additions and 8 deletions
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55
lang/ast/msgh.c
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@@ -1,6 +1,8 @@
#include "ctx.h"
#include "ivy/status.h"
#include "node.h"
#include "block.h"
#include "iterate.h"
#include <blue/object/string.h>
#include <ivy/lang/lex.h>
@@ -13,7 +15,7 @@ struct msgh_parser_state {
unsigned int s_prev;
};
static struct token_parse_result parse_expr(
static struct token_parse_result parse_linefeed(
struct ivy_parser *ctx, struct ivy_token *tok)
{
struct msgh_parser_state *state
@@ -22,14 +24,24 @@ static struct token_parse_result parse_expr(
struct ivy_ast_msgh_node *msgh
= (struct ivy_ast_msgh_node *)state->s_base.s_node;
if (state->s_oneline) {
if (msgh->n_body) {
parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
return PARSE_RESULT(IVY_OK, 0);
}
return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
}
if (!msgh->n_sel) {
return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
}
parser_push_state(ctx, IVY_AST_EXPR);
return PARSE_RESULT(IVY_OK, PARSE_REPEAT_TOKEN);
}
struct block_parser_state *block_state = (struct block_parser_state *)parser_push_state(ctx, IVY_AST_BLOCK);
block_state->s_terminator = IVY_SYM_BANG;
return PARSE_RESULT(IVY_OK, 0);
}
static struct token_parse_result parse_bang(
struct ivy_parser *ctx, struct ivy_token *tok)
@@ -44,10 +56,29 @@ static struct token_parse_result parse_bang(
return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
}
parser_pop_state(ctx, STATE_ADD_NODE_TO_PARENT);
return PARSE_RESULT(IVY_OK, 0);
}
static struct token_parse_result parse_pipe(
struct ivy_parser *ctx, struct ivy_token *tok)
{
struct msgh_parser_state *state
= parser_get_state(ctx, struct msgh_parser_state);
struct ivy_ast_msgh_node *msgh
= (struct ivy_ast_msgh_node *)state->s_base.s_node;
if (!msgh->n_sel || state->s_oneline) {
return PARSE_RESULT(IVY_ERR_BAD_SYNTAX, 0);
}
state->s_oneline = true;
parser_push_state(ctx, IVY_AST_EXPR);
return PARSE_RESULT(IVY_OK, 0);
}
static enum ivy_status add_child(
struct ivy_ast_node *parent, struct ivy_ast_node *child)
{
@@ -58,7 +89,7 @@ static enum ivy_status add_child(
return IVY_OK;
}
if (child->n_type == IVY_AST_BLOCK && !msgh->n_body) {
if (!msgh->n_body) {
msgh->n_body = child;
return IVY_OK;
}
@@ -76,15 +107,25 @@ static void init_state(struct ivy_parser *ctx, struct parser_state *sp)
parser_push_state(ctx, IVY_AST_SELECTOR);
}
static void collect_children(
struct ivy_ast_node *node, struct ivy_ast_node_iterator *iterator)
{
struct ivy_ast_msgh_node *msgh = (struct ivy_ast_msgh_node *)node;
ast_node_iterator_enqueue_node(iterator, node, &msgh->n_sel->n_base);
ast_node_iterator_enqueue_node(iterator, node, &msgh->n_body->n_base);
}
struct ast_node_type msgh_node_ops = {
.n_add_child = add_child,
.n_init_state = init_state,
.n_collect_children = collect_children,
.n_state_size = sizeof(struct msgh_parser_state),
.n_node_size = sizeof(struct ivy_ast_msgh_node),
.n_expr_parser = {
.expr_begin = parse_expr,
.n_token_parsers = {
TOK_PARSER(LINEFEED, parse_linefeed),
},
.n_symbol_parsers = {
SYM_PARSER(BANG, parse_bang),
SYM_PARSER(PIPE, parse_pipe),
},
};