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compiler.c
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compiler.c
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//> Scanning on Demand compiler-c
//> Compiling Expressions compiler-include-stdlib
//< Compiling Expressions compiler-include-stdlib
//> Local Variables compiler-include-string
//< Local Variables compiler-include-string
#include "common.h"
#include "compiler.h"
//> Garbage Collection compiler-include-memory
#include "memory.h"
//< Garbage Collection compiler-include-memory
#include "scanner.h"
//> Compiling Expressions include-debug
#ifdef DEBUG_PRINT_CODE
#include "debug.h"
#endif
//< Compiling Expressions include-debug
//> Compiling Expressions parser
typedef struct {
Token current;
Token previous;
//> had-error-field
bool hadError;
//< had-error-field
//> panic-mode-field
bool panicMode;
//< panic-mode-field
} Parser;
//> precedence
typedef enum {
PREC_NONE,
PREC_ASSIGNMENT, // =
PREC_OR, // or
PREC_AND, // and
PREC_EQUALITY, // == !=
PREC_COMPARISON, // < > <= >=
PREC_TERM, // + -
PREC_FACTOR, // * /
PREC_UNARY, // ! -
PREC_CALL, // . ()
PREC_PRIMARY
} Precedence;
//< precedence
//> parse-fn-type
//< parse-fn-type
/* Compiling Expressions parse-fn-type < Global Variables parse-fn-type
typedef void (*ParseFn)();
*/
//> Global Variables parse-fn-type
typedef void (*ParseFn)(bool canAssign);
//< Global Variables parse-fn-type
//> parse-rule
typedef struct {
ParseFn prefix;
ParseFn infix;
Precedence precedence;
} ParseRule;
//< parse-rule
//> Local Variables local-struct
typedef struct {
Token name;
int depth;
//> Closures is-captured-field
bool isCaptured;
//< Closures is-captured-field
} Local;
//< Local Variables local-struct
//> Closures upvalue-struct
typedef struct {
u8int index;
bool isLocal;
} Upvalue;
//< Closures upvalue-struct
//> Calls and Functions function-type-enum
typedef enum {
TYPE_FUNCTION,
//> Methods and Initializers initializer-type-enum
TYPE_INITIALIZER,
//< Methods and Initializers initializer-type-enum
//> Methods and Initializers method-type-enum
TYPE_METHOD,
//< Methods and Initializers method-type-enum
TYPE_SCRIPT
} FunctionType;
//< Calls and Functions function-type-enum
//> Local Variables compiler-struct
typedef struct Compiler {
//> Calls and Functions enclosing-field
struct Compiler* enclosing;
//< Calls and Functions enclosing-field
//> Calls and Functions function-fields
ObjFunction* function;
FunctionType type;
//< Calls and Functions function-fields
Local locals[UINT8_COUNT];
int localCount;
//> Closures upvalues-array
Upvalue upvalues[UINT8_COUNT];
//< Closures upvalues-array
int scopeDepth;
} Compiler;
//< Local Variables compiler-struct
//> Methods and Initializers class-compiler-struct
typedef struct ClassCompiler {
struct ClassCompiler* enclosing;
Token name;
//> Superclasses has-superclass
bool hasSuperclass;
//< Superclasses has-superclass
} ClassCompiler;
//< Methods and Initializers class-compiler-struct
Parser parser;
//< Compiling Expressions parser
//> Local Variables current-compiler
Compiler* current = nil;
//< Local Variables current-compiler
//> Methods and Initializers current-class
ClassCompiler* currentClass = nil;
//< Methods and Initializers current-class
//> Compiling Expressions compiling-chunk
/* Compiling Expressions compiling-chunk < Calls and Functions current-chunk
Chunk* compilingChunk;
static Chunk* currentChunk(void) {
return compilingChunk;
}
*/
//> Calls and Functions current-chunk
static Chunk* currentChunk(void) {
return ¤t->function->chunk;
}
//< Calls and Functions current-chunk
//< Compiling Expressions compiling-chunk
//> Compiling Expressions error-at
static void errorAt(Token* token, const char* message) {
//> check-panic-mode
if (parser.panicMode) return;
//< check-panic-mode
//> set-panic-mode
parser.panicMode = true;
//< set-panic-mode
fprint(1, "[line %d] Error", token->line);
if (token->type == TOKEN_EOF) {
fprint(1, " at end");
} else if (token->type == TOKEN_ERROR) {
// Nothing.
} else {
fprint(1, " at '%.*s'", token->length, token->start);
}
fprint(1, ": %s\n", message);
parser.hadError = true;
}
//< Compiling Expressions error-at
//> Compiling Expressions error
static void error(const char* message) {
errorAt(&parser.previous, message);
}
//< Compiling Expressions error
//> Compiling Expressions error-at-current
static void errorAtCurrent(const char* message) {
errorAt(&parser.current, message);
}
//< Compiling Expressions error-at-current
//> Compiling Expressions advance
static void advance(void) {
parser.previous = parser.current;
for (;;) {
parser.current = scanToken();
if (parser.current.type != TOKEN_ERROR) break;
errorAtCurrent(parser.current.start);
}
}
//< Compiling Expressions advance
//> Compiling Expressions consume
static void consume(TokenType type, const char* message) {
if (parser.current.type == type) {
advance();
return;
}
errorAtCurrent(message);
}
//< Compiling Expressions consume
//> Global Variables check
static bool check(TokenType type) {
return parser.current.type == type;
}
//< Global Variables check
//> Global Variables match
static bool match(TokenType type) {
if (!check(type)) return false;
advance();
return true;
}
//< Global Variables match
//> Compiling Expressions emit-byte
static void emitByte(u8int byte) {
writeChunk(currentChunk(), byte, parser.previous.line);
}
//< Compiling Expressions emit-byte
//> Compiling Expressions emit-bytes
static void emitBytes(u8int byte1, u8int byte2) {
emitByte(byte1);
emitByte(byte2);
}
//< Compiling Expressions emit-bytes
//> Jumping Back and Forth emit-loop
static void emitLoop(int loopStart) {
emitByte(OP_LOOP);
int offset = currentChunk()->count - loopStart + 2;
if (offset > UINT16_MAX) error("Loop body too large.");
emitByte((offset >> 8) & 0xff);
emitByte(offset & 0xff);
}
//< Jumping Back and Forth emit-loop
//> Jumping Back and Forth emit-jump
static int emitJump(u8int instruction) {
emitByte(instruction);
emitByte(0xff);
emitByte(0xff);
return currentChunk()->count - 2;
}
//< Jumping Back and Forth emit-jump
//> Compiling Expressions emit-return
static void emitReturn(void) {
/* Calls and Functions return-nil < Methods and Initializers return-this
emitByte(OP_NIL);
*/
//> Methods and Initializers return-this
if (current->type == TYPE_INITIALIZER) {
emitBytes(OP_GET_LOCAL, 0);
} else {
emitByte(OP_NIL);
}
//< Methods and Initializers return-this
emitByte(OP_RETURN);
}
//< Compiling Expressions emit-return
//> Compiling Expressions make-constant
static u8int makeConstant(Value value) {
int constant = addConstant(currentChunk(), value);
if (constant > UINT8_MAX) {
error("Too many constants in one chunk.");
return 0;
}
return (u8int)constant;
}
//< Compiling Expressions make-constant
//> Compiling Expressions emit-constant
static void emitConstant(Value value) {
emitBytes(OP_CONSTANT, makeConstant(value));
}
//< Compiling Expressions emit-constant
//> Jumping Back and Forth patch-jump
static void patchJump(int offset) {
// -2 to adjust for the bytecode for the jump offset itself.
int jump = currentChunk()->count - offset - 2;
if (jump > UINT16_MAX) {
error("Too much code to jump over.");
}
currentChunk()->code[offset] = (jump >> 8) & 0xff;
currentChunk()->code[offset + 1] = jump & 0xff;
}
//< Jumping Back and Forth patch-jump
//> Local Variables init-compiler
/* Local Variables init-compiler < Calls and Functions init-compiler
static void initCompiler(Compiler* compiler) {
*/
//> Calls and Functions init-compiler
static void initCompiler(Compiler* compiler, FunctionType type) {
//> store-enclosing
compiler->enclosing = current;
//< store-enclosing
compiler->function = nil;
compiler->type = type;
//< Calls and Functions init-compiler
compiler->localCount = 0;
compiler->scopeDepth = 0;
//> Calls and Functions init-function
compiler->function = newFunction();
//< Calls and Functions init-function
current = compiler;
//> Calls and Functions init-function-name
if (type != TYPE_SCRIPT) {
current->function->name = copyString(parser.previous.start,
parser.previous.length);
}
//< Calls and Functions init-function-name
//> Calls and Functions init-function-slot
Local* local = ¤t->locals[current->localCount++];
local->depth = 0;
//> Closures init-zero-local-is-captured
local->isCaptured = false;
//< Closures init-zero-local-is-captured
/* Calls and Functions init-function-slot < Methods and Initializers slot-zero
local->name.start = "";
local->name.length = 0;
*/
//> Methods and Initializers slot-zero
if (type != TYPE_FUNCTION) {
local->name.start = "this";
local->name.length = 4;
} else {
local->name.start = "";
local->name.length = 0;
}
//< Methods and Initializers slot-zero
//< Calls and Functions init-function-slot
}
//< Local Variables init-compiler
//> Compiling Expressions end-compiler
/* Compiling Expressions end-compiler < Calls and Functions end-compiler
static void endCompiler(void) {
*/
//> Calls and Functions end-compiler
static ObjFunction* endCompiler(void) {
//< Calls and Functions end-compiler
emitReturn();
//> Calls and Functions end-function
ObjFunction* function = current->function;
//< Calls and Functions end-function
//> dump-chunk
#ifdef DEBUG_PRINT_CODE
if (!parser.hadError) {
/* Compiling Expressions dump-chunk < Calls and Functions disassemble-end
disassembleChunk(currentChunk(), "code");
*/
//> Calls and Functions disassemble-end
disassembleChunk(currentChunk(),
function->name != nil ? function->name->chars : "<script>");
//< Calls and Functions disassemble-end
}
#endif
//< dump-chunk
//> Calls and Functions return-function
//> restore-enclosing
current = current->enclosing;
//< restore-enclosing
return function;
//< Calls and Functions return-function
}
//< Compiling Expressions end-compiler
//> Local Variables begin-scope
static void beginScope(void) {
current->scopeDepth++;
}
//< Local Variables begin-scope
//> Local Variables end-scope
static void endScope(void) {
current->scopeDepth--;
//> pop-locals
while (current->localCount > 0 &&
current->locals[current->localCount - 1].depth >
current->scopeDepth) {
/* Local Variables pop-locals < Closures end-scope
emitByte(OP_POP);
*/
//> Closures end-scope
if (current->locals[current->localCount - 1].isCaptured) {
emitByte(OP_CLOSE_UPVALUE);
} else {
emitByte(OP_POP);
}
//< Closures end-scope
current->localCount--;
}
//< pop-locals
}
//< Local Variables end-scope
//> Compiling Expressions forward-declarations
static void expression(void);
//> Global Variables forward-declarations
static void statement(void);
static void declaration(void);
//< Global Variables forward-declarations
static ParseRule* getRule(TokenType type);
static void parsePrecedence(Precedence precedence);
//< Compiling Expressions forward-declarations
//> Global Variables identifier-constant
static u8int identifierConstant(Token* name) {
return makeConstant(OBJ_VAL(copyString(name->start, name->length)));
}
//< Global Variables identifier-constant
//> Local Variables identifiers-equal
static bool identifiersEqual(Token* a, Token* b) {
if (a->length != b->length) return false;
return memcmp(a->start, b->start, a->length) == 0;
}
//< Local Variables identifiers-equal
//> Local Variables resolve-local
static int resolveLocal(Compiler* compiler, Token* name) {
for (int i = compiler->localCount - 1; i >= 0; i--) {
Local* local = &compiler->locals[i];
if (identifiersEqual(name, &local->name)) {
//> own-initializer-error
if (local->depth == -1) {
error("Cannot read local variable in its own initializer.");
}
//< own-initializer-error
return i;
}
}
return -1;
}
//< Local Variables resolve-local
//> Closures add-upvalue
static int addUpvalue(Compiler* compiler, u8int index, bool isLocal) {
int upvalueCount = compiler->function->upvalueCount;
//> existing-upvalue
for (int i = 0; i < upvalueCount; i++) {
Upvalue* upvalue = &compiler->upvalues[i];
if (upvalue->index == index && upvalue->isLocal == isLocal) {
return i;
}
}
//< existing-upvalue
//> too-many-upvalues
if (upvalueCount == UINT8_COUNT) {
error("Too many closure variables in function.");
return 0;
}
//< too-many-upvalues
compiler->upvalues[upvalueCount].isLocal = isLocal;
compiler->upvalues[upvalueCount].index = index;
return compiler->function->upvalueCount++;
}
//< Closures add-upvalue
//> Closures resolve-upvalue
static int resolveUpvalue(Compiler* compiler, Token* name) {
if (compiler->enclosing == nil) return -1;
int local = resolveLocal(compiler->enclosing, name);
if (local != -1) {
//> mark-local-captured
compiler->enclosing->locals[local].isCaptured = true;
//< mark-local-captured
return addUpvalue(compiler, (u8int)local, true);
}
//> resolve-upvalue-recurse
int upvalue = resolveUpvalue(compiler->enclosing, name);
if (upvalue != -1) {
return addUpvalue(compiler, (u8int)upvalue, false);
}
//< resolve-upvalue-recurse
return -1;
}
//< Closures resolve-upvalue
//> Local Variables add-local
static void addLocal(Token name) {
//> too-many-locals
if (current->localCount == UINT8_COUNT) {
error("Too many local variables in function.");
return;
}
//< too-many-locals
Local* local = ¤t->locals[current->localCount++];
local->name = name;
/* Local Variables add-local < Local Variables declare-undefined
local->depth = current->scopeDepth;
*/
//> declare-undefined
local->depth = -1;
//< declare-undefined
//> Closures init-is-captured
local->isCaptured = false;
//< Closures init-is-captured
}
//< Local Variables add-local
//> Local Variables declare-variable
static void declareVariable(void) {
// Global variables are implicitly declared.
if (current->scopeDepth == 0) return;
Token* name = &parser.previous;
//> existing-in-scope
for (int i = current->localCount - 1; i >= 0; i--) {
Local* local = ¤t->locals[i];
if (local->depth != -1 && local->depth < current->scopeDepth) {
break; // [negative]
}
if (identifiersEqual(name, &local->name)) {
error("Variable with this name already declared in this scope.");
}
}
//< existing-in-scope
addLocal(*name);
}
//< Local Variables declare-variable
//> Global Variables parse-variable
static u8int parseVariable(const char* errorMessage) {
consume(TOKEN_IDENTIFIER, errorMessage);
//> Local Variables parse-local
declareVariable();
if (current->scopeDepth > 0) return 0;
//< Local Variables parse-local
return identifierConstant(&parser.previous);
}
//< Global Variables parse-variable
//> Local Variables mark-initialized
static void markInitialized(void) {
//> Calls and Functions check-depth
if (current->scopeDepth == 0) return;
//< Calls and Functions check-depth
current->locals[current->localCount - 1].depth =
current->scopeDepth;
}
//< Local Variables mark-initialized
//> Global Variables define-variable
static void defineVariable(u8int global) {
//> Local Variables define-variable
if (current->scopeDepth > 0) {
//> define-local
markInitialized();
//< define-local
return;
}
//< Local Variables define-variable
emitBytes(OP_DEFINE_GLOBAL, global);
}
//< Global Variables define-variable
//> Calls and Functions argument-list
static u8int argumentList(void) {
u8int argCount = 0;
if (!check(TOKEN_RIGHT_PAREN)) {
do {
expression();
//> arg-limit
if (argCount == 255) {
error("Cannot have more than 255 arguments.");
}
//< arg-limit
argCount++;
} while (match(TOKEN_COMMA));
}
consume(TOKEN_RIGHT_PAREN, "Expect ')' after arguments.");
return argCount;
}
//< Calls and Functions argument-list
//> Jumping Back and Forth and
static void and_(bool canAssign) {
int endJump = emitJump(OP_JUMP_IF_FALSE);
emitByte(OP_POP);
parsePrecedence(PREC_AND);
patchJump(endJump);
}
//< Jumping Back and Forth and
//> Compiling Expressions binary
/* Compiling Expressions binary < Global Variables binary
static void binary(void) {
*/
//> Global Variables binary
static void binary(bool canAssign) {
//< Global Variables binary
// Remember the operator.
TokenType operatorType = parser.previous.type;
// Compile the right operand.
ParseRule* rule = getRule(operatorType);
parsePrecedence((Precedence)(rule->precedence + 1));
// Emit the operator instruction.
switch (operatorType) {
//> Types of Values comparison-operators
case TOKEN_BANG_EQUAL: emitBytes(OP_EQUAL, OP_NOT); break;
case TOKEN_EQUAL_EQUAL: emitByte(OP_EQUAL); break;
case TOKEN_GREATER: emitByte(OP_GREATER); break;
case TOKEN_GREATER_EQUAL: emitBytes(OP_LESS, OP_NOT); break;
case TOKEN_LESS: emitByte(OP_LESS); break;
case TOKEN_LESS_EQUAL: emitBytes(OP_GREATER, OP_NOT); break;
//< Types of Values comparison-operators
case TOKEN_PLUS: emitByte(OP_ADD); break;
case TOKEN_MINUS: emitByte(OP_SUBTRACT); break;
case TOKEN_STAR: emitByte(OP_MULTIPLY); break;
case TOKEN_SLASH: emitByte(OP_DIVIDE); break;
default:
return; // Unreachable.
}
}
//< Compiling Expressions binary
//> Calls and Functions compile-call
static void call(bool canAssign) {
u8int argCount = argumentList();
emitBytes(OP_CALL, argCount);
}
//< Calls and Functions compile-call
//> Classes and Instances compile-dot
static void dot(bool canAssign) {
consume(TOKEN_IDENTIFIER, "Expect property name after '.'.");
u8int name = identifierConstant(&parser.previous);
if (canAssign && match(TOKEN_EQUAL)) {
expression();
emitBytes(OP_SET_PROPERTY, name);
//> Methods and Initializers parse-call
} else if (match(TOKEN_LEFT_PAREN)) {
u8int argCount = argumentList();
emitBytes(OP_INVOKE, name);
emitByte(argCount);
//< Methods and Initializers parse-call
} else {
emitBytes(OP_GET_PROPERTY, name);
}
}
//< Classes and Instances compile-dot
//> Types of Values parse-literal
/* Types of Values parse-literal < Global Variables parse-literal
static void literal(void) {
*/
//> Global Variables parse-literal
static void literal(bool canAssign) {
//< Global Variables parse-literal
switch (parser.previous.type) {
case TOKEN_FALSE: emitByte(OP_FALSE); break;
case TOKEN_NIL: emitByte(OP_NIL); break;
case TOKEN_TRUE: emitByte(OP_TRUE); break;
default:
return; // Unreachable.
}
}
//< Types of Values parse-literal
//> Compiling Expressions grouping
/* Compiling Expressions grouping < Global Variables grouping
static void grouping(void) {
*/
//> Global Variables grouping
static void grouping(bool canAssign) {
//< Global Variables grouping
expression();
consume(TOKEN_RIGHT_PAREN, "Expect ')' after expression.");
}
//< Compiling Expressions grouping
/* Compiling Expressions number < Global Variables number
static void number(void) {
*/
//> Compiling Expressions number
//> Global Variables number
static void number(bool canAssign) {
//< Global Variables number
double value = strtod(parser.previous.start, nil);
/* Compiling Expressions number < Types of Values const-number-val
emitConstant(value);
*/
//> Types of Values const-number-val
emitConstant(NUMBER_VAL(value));
//< Types of Values const-number-val
}
//< Compiling Expressions number
//> Jumping Back and Forth or
static void or_(bool canAssign) {
int elseJump = emitJump(OP_JUMP_IF_FALSE);
int endJump = emitJump(OP_JUMP);
patchJump(elseJump);
emitByte(OP_POP);
parsePrecedence(PREC_OR);
patchJump(endJump);
}
//< Jumping Back and Forth or
/* Strings parse-string < Global Variables string
static void string() {
*/
//> Strings parse-string
//> Global Variables string
static void string(bool canAssign) {
//< Global Variables string
emitConstant(OBJ_VAL(copyString(parser.previous.start + 1,
parser.previous.length - 2)));
}
//< Strings parse-string
/* Global Variables read-named-variable < Global Variables named-variable-signature
static void namedVariable(Token name) {
*/
//> Global Variables named-variable-signature
static void namedVariable(Token name, bool canAssign) {
//< Global Variables named-variable-signature
/* Global Variables read-named-variable < Local Variables named-local
u8int arg = identifierConstant(&name);
*/
//> Global Variables read-named-variable
//> Local Variables named-local
u8int getOp, setOp;
int arg = resolveLocal(current, &name);
if (arg != -1) {
getOp = OP_GET_LOCAL;
setOp = OP_SET_LOCAL;
//> Closures named-variable-upvalue
} else if ((arg = resolveUpvalue(current, &name)) != -1) {
getOp = OP_GET_UPVALUE;
setOp = OP_SET_UPVALUE;
//< Closures named-variable-upvalue
} else {
arg = identifierConstant(&name);
getOp = OP_GET_GLOBAL;
setOp = OP_SET_GLOBAL;
}
//< Local Variables named-local
/* Global Variables read-named-variable < Global Variables named-variable
emitBytes(OP_GET_GLOBAL, arg);
*/
//> named-variable
/* Global Variables named-variable < Global Variables named-variable-can-assign
if (match(TOKEN_EQUAL)) {
*/
//> named-variable-can-assign
if (canAssign && match(TOKEN_EQUAL)) {
//< named-variable-can-assign
expression();
/* Global Variables named-variable < Local Variables emit-set
emitBytes(OP_SET_GLOBAL, arg);
*/
//> Local Variables emit-set
emitBytes(setOp, (u8int)arg);
//< Local Variables emit-set
} else {
/* Global Variables named-variable < Local Variables emit-get
emitBytes(OP_GET_GLOBAL, arg);
*/
//> Local Variables emit-get
emitBytes(getOp, (u8int)arg);
//< Local Variables emit-get
}
//< named-variable
}
//< Global Variables read-named-variable
/* Global Variables variable-without-assign < Global Variables variable
static void variable() {
namedVariable(parser.previous);
}
*/
//> Global Variables variable
static void variable(bool canAssign) {
namedVariable(parser.previous, canAssign);
}
//< Global Variables variable
//> Superclasses synthetic-token
static Token syntheticToken(const char* text) {
Token token;
token.start = text;
token.length = (int)strlen(text);
return token;
}
//< Superclasses synthetic-token
//> Superclasses super
static void super_(bool canAssign) {
//> super-errors
if (currentClass == nil) {
error("Cannot use 'super' outside of a class.");
} else if (!currentClass->hasSuperclass) {
error("Cannot use 'super' in a class with no superclass.");
}
//< super-errors
consume(TOKEN_DOT, "Expect '.' after 'super'.");
consume(TOKEN_IDENTIFIER, "Expect superclass method name.");
u8int name = identifierConstant(&parser.previous);
//> super-get
namedVariable(syntheticToken("this"), false);
/* Superclasses super-get < Superclasses super-invoke
namedVariable(syntheticToken("super"), false);
emitBytes(OP_GET_SUPER, name);
*/
//< super-get
//> super-invoke
if (match(TOKEN_LEFT_PAREN)) {
u8int argCount = argumentList();
namedVariable(syntheticToken("super"), false);
emitBytes(OP_SUPER_INVOKE, name);
emitByte(argCount);
} else {
namedVariable(syntheticToken("super"), false);
emitBytes(OP_GET_SUPER, name);
}
//< super-invoke
}
//< Superclasses super
//> Methods and Initializers this
static void this_(bool canAssign) {
//> this-outside-class
if (currentClass == nil) {
error("Cannot use 'this' outside of a class.");
return;
}
//< this-outside-class
variable(false);
} // [this]
//< Methods and Initializers this
//> Compiling Expressions unary
/* Compiling Expressions unary < Global Variables unary
static void unary(void) {
*/
//> Global Variables unary
static void unary(bool canAssign) {
//< Global Variables unary
TokenType operatorType = parser.previous.type;
// Compile the operand.
/* Compiling Expressions unary < Compiling Expressions unary-operand
expression();
*/
//> unary-operand
parsePrecedence(PREC_UNARY);
//< unary-operand
// Emit the operator instruction.
switch (operatorType) {
//> Types of Values compile-not
case TOKEN_BANG: emitByte(OP_NOT); break;
//< Types of Values compile-not
case TOKEN_MINUS: emitByte(OP_NEGATE); break;
default:
return; // Unreachable.
}
}
//< Compiling Expressions unary
//> Compiling Expressions rules
ParseRule rules[] = {
/* Compiling Expressions rules < Calls and Functions infix-left-paren
{ grouping, nil, PREC_NONE }, // TOKEN_LEFT_PAREN
*/
//> Calls and Functions infix-left-paren
{ grouping, call, PREC_CALL }, // TOKEN_LEFT_PAREN
//< Calls and Functions infix-left-paren
{ nil, nil, PREC_NONE }, // TOKEN_RIGHT_PAREN
{ nil, nil, PREC_NONE }, // TOKEN_LEFT_BRACE [big]
{ nil, nil, PREC_NONE }, // TOKEN_RIGHT_BRACE
{ nil, nil, PREC_NONE }, // TOKEN_COMMA
/* Compiling Expressions rules < Classes and Instances table-dot
{ nil, nil, PREC_NONE }, // TOKEN_DOT
*/
//> Classes and Instances table-dot
{ nil, dot, PREC_CALL }, // TOKEN_DOT
//< Classes and Instances table-dot
{ unary, binary, PREC_TERM }, // TOKEN_MINUS
{ nil, binary, PREC_TERM }, // TOKEN_PLUS
{ nil, nil, PREC_NONE }, // TOKEN_SEMICOLON
{ nil, binary, PREC_FACTOR }, // TOKEN_SLASH
{ nil, binary, PREC_FACTOR }, // TOKEN_STAR
/* Compiling Expressions rules < Types of Values table-not
{ nil, nil, PREC_NONE }, // TOKEN_BANG
*/
//> Types of Values table-not
{ unary, nil, PREC_NONE }, // TOKEN_BANG
//< Types of Values table-not
/* Compiling Expressions rules < Types of Values table-equal
{ nil, nil, PREC_NONE }, // TOKEN_BANG_EQUAL
*/
//> Types of Values table-equal
{ nil, binary, PREC_EQUALITY }, // TOKEN_BANG_EQUAL
//< Types of Values table-equal
{ nil, nil, PREC_NONE }, // TOKEN_EQUAL
/* Compiling Expressions rules < Types of Values table-comparisons
{ nil, nil, PREC_NONE }, // TOKEN_EQUAL_EQUAL
{ nil, nil, PREC_NONE }, // TOKEN_GREATER
{ nil, nil, PREC_NONE }, // TOKEN_GREATER_EQUAL
{ nil, nil, PREC_NONE }, // TOKEN_LESS
{ nil, nil, PREC_NONE }, // TOKEN_LESS_EQUAL
*/
//> Types of Values table-comparisons
{ nil, binary, PREC_EQUALITY }, // TOKEN_EQUAL_EQUAL
{ nil, binary, PREC_COMPARISON }, // TOKEN_GREATER
{ nil, binary, PREC_COMPARISON }, // TOKEN_GREATER_EQUAL
{ nil, binary, PREC_COMPARISON }, // TOKEN_LESS
{ nil, binary, PREC_COMPARISON }, // TOKEN_LESS_EQUAL
//< Types of Values table-comparisons
/* Compiling Expressions rules < Global Variables table-identifier
{ nil, nil, PREC_NONE }, // TOKEN_IDENTIFIER
*/
//> Global Variables table-identifier
{ variable, nil, PREC_NONE }, // TOKEN_IDENTIFIER
//< Global Variables table-identifier
/* Compiling Expressions rules < Strings table-string
{ nil, nil, PREC_NONE }, // TOKEN_STRING
*/
//> Strings table-string
{ string, nil, PREC_NONE }, // TOKEN_STRING
//< Strings table-string
{ number, nil, PREC_NONE }, // TOKEN_NUMBER
/* Compiling Expressions rules < Jumping Back and Forth table-and
{ nil, nil, PREC_NONE }, // TOKEN_AND
*/
//> Jumping Back and Forth table-and
{ nil, and_, PREC_AND }, // TOKEN_AND
//< Jumping Back and Forth table-and
{ nil, nil, PREC_NONE }, // TOKEN_CLASS
{ nil, nil, PREC_NONE }, // TOKEN_ELSE
/* Compiling Expressions rules < Types of Values table-false
{ nil, nil, PREC_NONE }, // TOKEN_FALSE
*/
//> Types of Values table-false
{ literal, nil, PREC_NONE }, // TOKEN_FALSE
//< Types of Values table-false
{ nil, nil, PREC_NONE }, // TOKEN_FOR
{ nil, nil, PREC_NONE }, // TOKEN_FUN
{ nil, nil, PREC_NONE }, // TOKEN_IF
/* Compiling Expressions rules < Types of Values table-nil
{ nil, nil, PREC_NONE }, // TOKEN_NIL
*/
//> Types of Values table-nil
{ literal, nil, PREC_NONE }, // TOKEN_NIL
//< Types of Values table-nil
/* Compiling Expressions rules < Jumping Back and Forth table-or
{ nil, nil, PREC_NONE }, // TOKEN_OR
*/
//> Jumping Back and Forth table-or
{ nil, or_, PREC_OR }, // TOKEN_OR
//< Jumping Back and Forth table-or
{ nil, nil, PREC_NONE }, // TOKEN_PRINT
{ nil, nil, PREC_NONE }, // TOKEN_RETURN
/* Compiling Expressions rules < Superclasses table-super
{ nil, nil, PREC_NONE }, // TOKEN_SUPER
*/
//> Superclasses table-super
{ super_, nil, PREC_NONE }, // TOKEN_SUPER
//< Superclasses table-super
/* Compiling Expressions rules < Methods and Initializers table-this
{ nil, nil, PREC_NONE }, // TOKEN_THIS
*/
//> Methods and Initializers table-this
{ this_, nil, PREC_NONE }, // TOKEN_THIS
//< Methods and Initializers table-this
/* Compiling Expressions rules < Types of Values table-true
{ nil, nil, PREC_NONE }, // TOKEN_TRUE
*/
//> Types of Values table-true
{ literal, nil, PREC_NONE }, // TOKEN_TRUE
//< Types of Values table-true
{ nil, nil, PREC_NONE }, // TOKEN_VAR
{ nil, nil, PREC_NONE }, // TOKEN_WHILE
{ nil, nil, PREC_NONE }, // TOKEN_ERROR
{ nil, nil, PREC_NONE }, // TOKEN_EOF
};
//< Compiling Expressions rules
//> Compiling Expressions parse-precedence
static void parsePrecedence(Precedence precedence) {
/* Compiling Expressions parse-precedence < Compiling Expressions precedence-body
// What goes here?
*/
//> precedence-body
advance();
ParseFn prefixRule = getRule(parser.previous.type)->prefix;
if (prefixRule == nil) {
error("Expect expression.");
return;
}
/* Compiling Expressions precedence-body < Global Variables prefix-rule
prefixRule();
*/