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// Parsing logic for type definitions
#include <stdbool.h>
#include <string.h>
#include "../ast.h"
#include "../util.h"
#include "context.h"
#include "errors.h"
#include "files.h"
#include "functions.h"
#include "statements.h"
#include "text.h"
#include "typedefs.h"
#include "utils.h"
ast_t *parse_namespace(parse_ctx_t *ctx, const char *pos) {
const char *start = pos;
whitespace(ctx, &pos);
int64_t indent = get_indent(ctx, pos);
ast_list_t *statements = NULL;
for (;;) {
const char *next = pos;
whitespace(ctx, &next);
if (get_indent(ctx, next) != indent) break;
ast_t *stmt;
if ((stmt = optional(ctx, &pos, parse_struct_def)) || (stmt = optional(ctx, &pos, parse_func_def))
|| (stmt = optional(ctx, &pos, parse_enum_def)) || (stmt = optional(ctx, &pos, parse_lang_def))
|| (stmt = optional(ctx, &pos, parse_convert_def)) || (stmt = optional(ctx, &pos, parse_use))
|| (stmt = optional(ctx, &pos, parse_inline_c)) || (stmt = optional(ctx, &pos, parse_declaration))) {
statements = new (ast_list_t, .ast = stmt, .next = statements);
pos = stmt->end;
whitespace(ctx, &pos); // TODO: check for newline
// if (!(space_types & WHITESPACE_NEWLINES)) {
// pos = stmt->end;
// break;
// }
} else {
if (get_indent(ctx, next) > indent && next < eol(next))
parser_err(ctx, next, eol(next), "I couldn't parse this namespace declaration");
break;
}
}
REVERSE_LIST(statements);
return NewAST(ctx->file, start, pos, Block, .statements = statements);
}
ast_t *parse_struct_def(parse_ctx_t *ctx, const char *pos) {
// struct Foo(...) [: \n body]
const char *start = pos;
if (!match_word(&pos, "struct")) return NULL;
int64_t starting_indent = get_indent(ctx, pos);
spaces(&pos);
const char *name = get_id(&pos);
if (!name) parser_err(ctx, start, pos, "I expected a name for this struct");
spaces(&pos);
if (!match(&pos, "(")) parser_err(ctx, pos, pos, "I expected a '(' and a list of fields here");
arg_ast_t *fields = parse_args(ctx, &pos);
whitespace(ctx, &pos);
bool secret = false, external = false, opaque = false;
if (match(&pos, ";")) { // Extra flags
whitespace(ctx, &pos);
for (;;) {
if (match_word(&pos, "secret")) {
secret = true;
} else if (match_word(&pos, "external")) {
external = true;
} else if (match_word(&pos, "opaque")) {
if (fields)
parser_err(ctx, pos - strlen("opaque"), pos, "A struct can't be opaque if it has fields defined");
opaque = true;
} else {
break;
}
if (!match_separator(ctx, &pos)) break;
}
}
expect_closing(ctx, &pos, ")", "I wasn't able to parse the rest of this struct");
ast_t *namespace = NULL;
const char *ns_pos = pos;
whitespace(ctx, &ns_pos);
int64_t ns_indent = get_indent(ctx, ns_pos);
if (ns_indent > starting_indent) {
pos = ns_pos;
namespace = optional(ctx, &pos, parse_namespace);
}
if (!namespace) namespace = NewAST(ctx->file, pos, pos, Block, .statements = NULL);
return NewAST(ctx->file, start, pos, StructDef, .name = name, .fields = fields, .namespace = namespace,
.secret = secret, .external = external, .opaque = opaque);
}
ast_t *parse_enum_def(parse_ctx_t *ctx, const char *pos) {
// tagged union: enum Foo(a, b(x:Int,y:Int)=5, ...) [: \n namespace]
const char *start = pos;
if (!match_word(&pos, "enum")) return NULL;
int64_t starting_indent = get_indent(ctx, pos);
spaces(&pos);
const char *name = get_id(&pos);
if (!name) parser_err(ctx, start, pos, "I expected a name for this enum");
spaces(&pos);
if (!match(&pos, "(")) return NULL;
tag_ast_t *tags = NULL;
whitespace(ctx, &pos);
for (;;) {
spaces(&pos);
const char *tag_start = pos;
const char *tag_name = get_id(&pos);
if (!tag_name) break;
spaces(&pos);
arg_ast_t *fields;
bool secret = false;
if (match(&pos, "(")) {
whitespace(ctx, &pos);
fields = parse_args(ctx, &pos);
whitespace(ctx, &pos);
if (match(&pos, ";")) { // Extra flags
whitespace(ctx, &pos);
secret = match_word(&pos, "secret");
whitespace(ctx, &pos);
}
expect_closing(ctx, &pos, ")", "I wasn't able to parse the rest of this tagged union member");
} else {
fields = NULL;
}
tags = new (tag_ast_t, .file = ctx->file, .start = tag_start, .end = pos, .name = tag_name, .fields = fields,
.secret = secret, .next = tags);
if (!match_separator(ctx, &pos)) break;
}
whitespace(ctx, &pos);
expect_closing(ctx, &pos, ")", "I wasn't able to parse the rest of this enum definition");
REVERSE_LIST(tags);
if (tags == NULL) parser_err(ctx, start, pos, "This enum does not have any tags!");
ast_t *namespace = NULL;
const char *ns_pos = pos;
whitespace(ctx, &ns_pos);
int64_t ns_indent = get_indent(ctx, ns_pos);
if (ns_indent > starting_indent) {
pos = ns_pos;
namespace = optional(ctx, &pos, parse_namespace);
}
if (!namespace) namespace = NewAST(ctx->file, pos, pos, Block, .statements = NULL);
return NewAST(ctx->file, start, pos, EnumDef, .name = name, .tags = tags, .namespace = namespace);
}
ast_t *parse_lang_def(parse_ctx_t *ctx, const char *pos) {
const char *start = pos;
// lang Name: [namespace...]
if (!match_word(&pos, "lang")) return NULL;
int64_t starting_indent = get_indent(ctx, pos);
spaces(&pos);
const char *name = get_id(&pos);
if (!name) parser_err(ctx, start, pos, "I expected a name for this lang");
spaces(&pos);
ast_t *namespace = NULL;
const char *ns_pos = pos;
whitespace(ctx, &ns_pos);
int64_t ns_indent = get_indent(ctx, ns_pos);
if (ns_indent > starting_indent) {
pos = ns_pos;
namespace = optional(ctx, &pos, parse_namespace);
}
if (!namespace) namespace = NewAST(ctx->file, pos, pos, Block, .statements = NULL);
return NewAST(ctx->file, start, pos, LangDef, .name = name, .namespace = namespace);
}
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