ryuslash/crafting-interpreters
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Cahapter 22.1

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This commit is contained in:
Tom Willemse 2021-10-21 20:00:19 -07:00
parent 26b418d254
commit df1985ae84
2 changed files with 22 additions and 0 deletions
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2
clox/src/common.h
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@ -8,4 +8,6 @@
#define DEBUG_PRINT_CODE #define DEBUG_PRINT_CODE
#define DEBUG_TRACE_EXECUTION #define DEBUG_TRACE_EXECUTION
#define UINT8_COUNT (UINT8_MAX + 1)
#endif #endif

20
clox/src/compiler.c
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@ -38,7 +38,19 @@ typedef struct {
Precedence precedence; Precedence precedence;
} ParseRule; } ParseRule;
typedef struct {
Token name;
int depth;
} Local;
typedef struct {
Local locals[UINT8_COUNT];
int localCount;
int scopeDepth;
} Compiler;
Parser parser; Parser parser;
Compiler *current = NULL;
Chunk *compilingChunk; Chunk *compilingChunk;
static Chunk *currentChunk() { return compilingChunk; } static Chunk *currentChunk() { return compilingChunk; }
@ -122,6 +134,12 @@ static void emitConstant(Value value) {
emitBytes(OP_CONSTANT, makeConstant(value)); emitBytes(OP_CONSTANT, makeConstant(value));
} }
static void initCompiler(Compiler *compiler) {
compiler->localCount = 0;
compiler->scopeDepth = 0;
current = compiler;
}
static void endCompiler() { static void endCompiler() {
emitReturn(); emitReturn();
#ifdef DEBUG_PRINT_CODE #ifdef DEBUG_PRINT_CODE
@ -398,6 +416,8 @@ static ParseRule *getRule(TokenType type) { return &rules[type]; }
bool compile(const char *source, Chunk *chunk) { bool compile(const char *source, Chunk *chunk) {
initScanner(source); initScanner(source);
Compiler compiler;
initCompiler(&compiler);
compilingChunk = chunk; compilingChunk = chunk;
parser.hadError = false; parser.hadError = false;