From 6ab9c3732793b6fd40e6388cf1b08756194c0ea6 Mon Sep 17 00:00:00 2001 From: Quinn Stephens Date: Thu, 7 Nov 2024 16:59:19 -0500 Subject: [compiler] Parse return statements Laid groundwork for statements and AST trees. Currently return values are not supported, expression parsing must be implemented first. Also stopped dumping parsed type definitions. Signed-off-by: Quinn Stephens --- compiler/parser/stmt.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 compiler/parser/stmt.c (limited to 'compiler/parser/stmt.c') diff --git a/compiler/parser/stmt.c b/compiler/parser/stmt.c new file mode 100644 index 0000000..6fe3d6d --- /dev/null +++ b/compiler/parser/stmt.c @@ -0,0 +1,62 @@ +/* + * Statement parser. + * Copyright (c) 2023-2024, Quinn Stephens and the OSMORA team. + * Provided under the BSD 3-Clause license. + */ + +#include +#include "debug.h" +#include "parser/ast.h" +#include "parser/stmt.h" +#include "parser/proc.h" +#include "parser.h" + +static bool +parse_ret(struct parser *ctx, struct ast_node *parent, struct procedure *proc) +{ + struct ast_node *node; + + (void)proc; + + debug("Parsing return statement...\n"); + + /* TODO: Parse return value */ + next_token(ctx); + + if (ctx->tok.kind != TK_SEMICOLON) { + tok_error(&ctx->tok, "Expected \";\"\n"); + return false; + } + next_token(ctx); + + node = ast_new_node(NK_RETURN); + ast_append_child(parent, node); + + return true; +} + +void +parse_stmt_block(struct parser *ctx, struct ast_node *parent, struct procedure *proc) +{ + bool success; + + debug("Parsing statement block...\n"); + + next_token(ctx); + while (ctx->tok.kind != TK_RBRACE) { + switch (ctx->tok.kind) { + case TK_RET: + success = parse_ret(ctx, parent, proc); + break; + default: + tok_error(&ctx->tok, "Expected statement\n"); + success = false; + break; + } + + if (!success) { + return; + } + } + next_token(ctx); +} -- cgit v1.2.3