Serendipity
c8da286d31
fn swap(out x: i64, out y: i64) 声明 out 参数，codegen 层面 函数签名变为 T* 指针，调用点自动传 &variable 地址。 in 是默认行为（值传递），无需显式标注。 Token → Parser → Sema → Codegen 全流水线: - TOK_OUT + "out" 关键字注册 - AST parameter.is_out 字段 - parse_function 解析 out 前缀 - Sema: out 参数注册为 SYM_VARIABLE+is_mut（可赋值） - Codegen: LLVM 函数签名使用 T*，调用点传 alloca Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
62 lines
2.6 KiB
C
62 lines
2.6 KiB
C
#include "token.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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static const char* NAMES[] = {
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[TOK_FN] = "fn", [TOK_LET] = "let", [TOK_VAR] = "var", [TOK_CONST] = "const", [TOK_IF] = "if", [TOK_GUARD] = "guard",
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[TOK_PUB] = "pub", [TOK_MOD] = "mod", [TOK_USE] = "use",
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[TOK_TRAIT] = "trait", [TOK_SELF] = "Self", [TOK_OUT] = "out",
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[TOK_ELSE] = "else", [TOK_WHILE] = "while", [TOK_FOR] = "for", [TOK_IN] = "in", [TOK_RETURN] = "return",
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[TOK_STRUCT] = "struct", [TOK_TYPE] = "type", [TOK_ENUM] = "enum", [TOK_EXTEND] = "extend",
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[TOK_DEFER] = "defer", [TOK_MATCH] = "match",
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[TOK_I32] = "i32", [TOK_I64] = "i64", [TOK_U64] = "u64", [TOK_F64] = "f64",
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[TOK_BOOL] = "bool", [TOK_CHAR] = "char", [TOK_STR] = "str", [TOK_VOID] = "void",
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[TOK_INT_LIT] = "整数", [TOK_FLOAT_LIT] = "浮点数",
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[TOK_CHAR_LIT] = "字符", [TOK_STR_LIT] = "字符串",
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[TOK_TRUE] = "true", [TOK_FALSE] = "false",
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[TOK_IDENT] = "标识符", [TOK_UNDERSCORE] = "_",
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[TOK_PLUS] = "+", [TOK_MINUS] = "-", [TOK_STAR] = "*",
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[TOK_SLASH] = "/", [TOK_PERCENT] = "%",
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[TOK_EQ_EQ] = "==", [TOK_BANG_EQ] = "!=",
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[TOK_LT] = "<", [TOK_GT] = ">", [TOK_LT_EQ] = "<=", [TOK_GT_EQ] = ">=",
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[TOK_AND_AND] = "&&", [TOK_PIPE_PIPE] = "||", [TOK_PIPE] = "|>", [TOK_BANG] = "!",
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[TOK_ARROW] = "->", [TOK_TO] = "to", [TOK_STEP] = "step", [TOK_MATCH_ARROW] = "=>",
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[TOK_PLUS_EQ] = "+=", [TOK_MINUS_EQ] = "-=", [TOK_STAR_EQ] = "*=", [TOK_SLASH_EQ] = "/=",
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[TOK_LPAREN] = "(", [TOK_RPAREN] = ")",
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[TOK_LBRACE] = "{", [TOK_RBRACE] = "}",
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[TOK_LBRACKET] = "[", [TOK_RBRACKET] = "]",
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[TOK_COMMA] = ",", [TOK_COLON] = ":", [TOK_SEMICOLON] = ";",
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[TOK_ASSIGN] = "=",
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[TOK_DOT] = ".", [TOK_COLON_COLON] = "::", [TOK_HASH] = "#",
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[TOK_QMARK_QMARK] = "??",
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[TOK_EOF] = "EOF", [TOK_ERROR] = "错误",
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};
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const char* tok_name(TokenKind kind) {
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return NAMES[kind];
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}
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bool tok_is_type(TokenKind kind) {
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return kind == TOK_I32 || kind == TOK_I64 || kind == TOK_U64
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|| kind == TOK_F64 || kind == TOK_BOOL || kind == TOK_CHAR
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|| kind == TOK_STR || kind == TOK_VOID;
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}
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int64_t tok_int_value(const Token* tok) {
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if (tok->length <= 0 || tok->length >= 32) return 0;
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char buf[32];
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memcpy(buf, tok->start, tok->length);
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buf[tok->length] = '\0';
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return strtoll(buf, NULL, 10);
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}
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double tok_float_value(const Token* tok) {
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if (tok->length <= 0 || tok->length >= 64) return 0.0;
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char buf[64];
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memcpy(buf, tok->start, tok->length);
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buf[tok->length] = '\0';
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return strtod(buf, NULL);
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}
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