mirror of
https://github.com/pocketpy/pocketpy
synced 2025-10-20 11:30:18 +00:00
1360 lines
47 KiB
C++
1360 lines
47 KiB
C++
#include "pocketpy/compiler/compiler.hpp"
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#include "pocketpy/common/config.h"
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#include "pocketpy/interpreter/vm.hpp"
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#include <cstdarg>
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namespace pkpy {
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#define consume(expected) if(!match(expected)) return SyntaxError("expected '%s', got '%s'", TK_STR(expected), TK_STR(curr().type));
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#define consume_end_stmt() if(!match_end_stmt()) return SyntaxError("expected statement end")
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#define check_newlines_repl() { bool __nml; match_newlines(&__nml); if(__nml) return NeedMoreLines(); }
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#define check(B) if((err = B)) return err
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PrattRule Compiler::rules[kTokenCount];
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NameScope Compiler::name_scope() const noexcept{
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auto s = contexts.size() > 1 ? NAME_LOCAL : NAME_GLOBAL;
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if(unknown_global_scope && s == NAME_GLOBAL) s = NAME_GLOBAL_UNKNOWN;
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return s;
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}
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CodeObject_ Compiler::push_global_context() noexcept{
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CodeObject_ co = std::make_shared<CodeObject>(lexer.src, static_cast<const Str&>(lexer.src->filename));
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co->start_line = __i == 0 ? 1 : prev().line;
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contexts.push_back(CodeEmitContext(vm, co, contexts.size()));
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return co;
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}
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FuncDecl_ Compiler::push_f_context(Str name) noexcept{
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FuncDecl_ decl = std::make_shared<FuncDecl>();
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decl->code = std::make_shared<CodeObject>(lexer.src, name);
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decl->code->start_line = __i == 0 ? 1 : prev().line;
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decl->nested = name_scope() == NAME_LOCAL;
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contexts.push_back(CodeEmitContext(vm, decl->code, contexts.size()));
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contexts.back().func = decl;
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return decl;
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}
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Error* Compiler::pop_context() noexcept{
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assert(ctx()->s_size() == 0);
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// add a `return None` in the end as a guard
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// previously, we only do this if the last opcode is not a return
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// however, this is buggy...since there may be a jump to the end (out of bound) even if the last opcode is a return
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ctx()->emit_(OP_RETURN_VALUE, 1, BC_KEEPLINE, true);
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// find the last valid token
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int j = __i - 1;
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while(tk(j).type == TK("@eol") || tk(j).type == TK("@dedent") || tk(j).type == TK("@eof"))
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j--;
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ctx()->co->end_line = tk(j).line;
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// some check here
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auto& codes = ctx()->co->codes;
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if(ctx()->co->nlocals > PK_MAX_CO_VARNAMES) {
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return SyntaxError("maximum number of local variables exceeded");
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}
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if(ctx()->co->consts.size() > 65530) {
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return SyntaxError("maximum number of constants exceeded");
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}
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// pre-compute LOOP_BREAK and LOOP_CONTINUE
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for(int i = 0; i < codes.size(); i++) {
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Bytecode& bc = codes[i];
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if(bc.op == OP_LOOP_CONTINUE) {
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bc.set_signed_arg(ctx()->co->blocks[bc.arg].start - i);
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} else if(bc.op == OP_LOOP_BREAK) {
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bc.set_signed_arg(ctx()->co->blocks[bc.arg].get_break_end() - i);
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}
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}
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// pre-compute func->is_simple
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FuncDecl_ func = contexts.back().func;
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if(func) {
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// check generator
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for(Bytecode bc: func->code->codes) {
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if(bc.op == OP_YIELD_VALUE || bc.op == OP_FOR_ITER_YIELD_VALUE) {
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func->type = FuncType::GENERATOR;
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for(Bytecode bc: func->code->codes) {
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if(bc.op == OP_RETURN_VALUE && bc.arg == BC_NOARG) {
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return SyntaxError("'return' with argument inside generator function");
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}
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}
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break;
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}
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}
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if(func->type == FuncType::UNSET) {
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bool is_simple = true;
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if(func->kwargs.size() > 0) is_simple = false;
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if(func->starred_arg >= 0) is_simple = false;
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if(func->starred_kwarg >= 0) is_simple = false;
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if(is_simple) {
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func->type = FuncType::SIMPLE;
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bool is_empty = false;
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if(func->code->codes.size() == 1) {
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Bytecode bc = func->code->codes[0];
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if(bc.op == OP_RETURN_VALUE && bc.arg == 1) { is_empty = true; }
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}
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if(is_empty) func->type = FuncType::EMPTY;
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} else
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func->type = FuncType::NORMAL;
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}
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assert(func->type != FuncType::UNSET);
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}
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contexts.pop_back();
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return NULL;
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}
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void Compiler::init_pratt_rules() noexcept{
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static bool initialized = false;
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if(initialized) return;
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initialized = true;
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// clang-format off
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// http://journal.stuffwithstuff.com/2011/03/19/pratt-parsers-expression-parsing-made-easy/
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#define PK_METHOD(name) &Compiler::name
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#define PK_NO_INFIX nullptr, PREC_LOWEST
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for(TokenIndex i = 0; i < kTokenCount; i++) rules[i] = { nullptr, PK_NO_INFIX };
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rules[TK(".")] = { nullptr, PK_METHOD(exprAttrib), PREC_PRIMARY };
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rules[TK("(")] = { PK_METHOD(exprGroup), PK_METHOD(exprCall), PREC_PRIMARY };
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rules[TK("[")] = { PK_METHOD(exprList), PK_METHOD(exprSubscr), PREC_PRIMARY };
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rules[TK("{")] = { PK_METHOD(exprMap), PK_NO_INFIX };
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rules[TK("%")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_FACTOR };
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rules[TK("+")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_TERM };
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rules[TK("-")] = { PK_METHOD(exprUnaryOp), PK_METHOD(exprBinaryOp), PREC_TERM };
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rules[TK("*")] = { PK_METHOD(exprUnaryOp), PK_METHOD(exprBinaryOp), PREC_FACTOR };
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rules[TK("~")] = { PK_METHOD(exprUnaryOp), nullptr, PREC_UNARY };
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rules[TK("/")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_FACTOR };
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rules[TK("//")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_FACTOR };
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rules[TK("**")] = { PK_METHOD(exprUnaryOp), PK_METHOD(exprBinaryOp), PREC_EXPONENT };
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rules[TK(">")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("<")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("==")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("!=")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK(">=")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("<=")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("in")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("is")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("<<")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_BITWISE_SHIFT };
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rules[TK(">>")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_BITWISE_SHIFT };
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rules[TK("&")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_BITWISE_AND };
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rules[TK("|")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_BITWISE_OR };
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rules[TK("^")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_BITWISE_XOR };
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rules[TK("@")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_FACTOR };
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rules[TK("if")] = { nullptr, PK_METHOD(exprTernary), PREC_TERNARY };
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rules[TK("not in")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("is not")] = { nullptr, PK_METHOD(exprBinaryOp), PREC_COMPARISION };
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rules[TK("and") ] = { nullptr, PK_METHOD(exprAnd), PREC_LOGICAL_AND };
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rules[TK("or")] = { nullptr, PK_METHOD(exprOr), PREC_LOGICAL_OR };
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rules[TK("not")] = { PK_METHOD(exprNot), nullptr, PREC_LOGICAL_NOT };
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rules[TK("True")] = { PK_METHOD(exprLiteral0), PK_NO_INFIX };
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rules[TK("False")] = { PK_METHOD(exprLiteral0), PK_NO_INFIX };
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rules[TK("None")] = { PK_METHOD(exprLiteral0), PK_NO_INFIX };
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rules[TK("...")] = { PK_METHOD(exprLiteral0), PK_NO_INFIX };
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rules[TK("lambda")] = { PK_METHOD(exprLambda), PK_NO_INFIX };
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rules[TK("@id")] = { PK_METHOD(exprName), PK_NO_INFIX };
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rules[TK("@num")] = { PK_METHOD(exprLiteral), PK_NO_INFIX };
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rules[TK("@str")] = { PK_METHOD(exprLiteral), PK_NO_INFIX };
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rules[TK("@fstr")] = { PK_METHOD(exprFString), PK_NO_INFIX };
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rules[TK("@long")] = { PK_METHOD(exprLong), PK_NO_INFIX };
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rules[TK("@imag")] = { PK_METHOD(exprImag), PK_NO_INFIX };
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rules[TK("@bytes")] = { PK_METHOD(exprBytes), PK_NO_INFIX };
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rules[TK(":")] = { PK_METHOD(exprSlice0), PK_METHOD(exprSlice1), PREC_PRIMARY };
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#undef PK_METHOD
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#undef PK_NO_INFIX
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// clang-format on
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}
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bool Compiler::match(TokenIndex expected) noexcept{
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if(curr().type != expected) return false;
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advance();
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return true;
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}
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bool Compiler::match_newlines(bool* need_more_lines) noexcept{
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bool consumed = false;
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if(curr().type == TK("@eol")) {
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while(curr().type == TK("@eol")) advance();
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consumed = true;
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}
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if(need_more_lines) {
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*need_more_lines = (mode() == REPL_MODE && curr().type == TK("@eof"));
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}
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return consumed;
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}
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bool Compiler::match_end_stmt() noexcept{
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if(match(TK(";"))) {
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match_newlines();
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return true;
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}
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if(match_newlines() || curr().type == TK("@eof")) return true;
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if(curr().type == TK("@dedent")) return true;
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return false;
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}
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Error* Compiler::EXPR_TUPLE(bool allow_slice) noexcept{
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Error* err;
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check(parse_expression(PREC_LOWEST + 1, allow_slice));
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if(!match(TK(","))) return NULL;
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// tuple expression
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int count = 1;
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do {
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if(curr().brackets_level) check_newlines_repl()
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if(!is_expression(allow_slice)) break;
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check(parse_expression(PREC_LOWEST + 1, allow_slice));
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count += 1;
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if(curr().brackets_level) check_newlines_repl();
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} while(match(TK(",")));
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TupleExpr* e = make_expr<TupleExpr>(count);
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for(int i=count-1; i>=0; i--)
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e->items[i] = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::EXPR_VARS() noexcept{
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int count = 0;
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do {
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consume(TK("@id"));
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ctx()->s_push(make_expr<NameExpr>(prev().str(), name_scope()));
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count += 1;
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} while(match(TK(",")));
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if(count > 1){
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TupleExpr* e = make_expr<TupleExpr>(count);
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for(int i=count-1; i>=0; i--)
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e->items[i] = ctx()->s_popx();
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ctx()->s_push(e);
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}
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return NULL;
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}
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Error* Compiler::exprLiteral() noexcept{
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ctx()->s_push(make_expr<LiteralExpr>(prev().value));
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return NULL;
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}
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Error* Compiler::exprLong() noexcept{
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ctx()->s_push(make_expr<LongExpr>(prev().str()));
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return NULL;
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}
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Error* Compiler::exprImag() noexcept{
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ctx()->s_push(make_expr<ImagExpr>(std::get<f64>(prev().value)));
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return NULL;
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}
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Error* Compiler::exprBytes() noexcept{
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ctx()->s_push(make_expr<BytesExpr>(std::get<Str>(prev().value)));
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return NULL;
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}
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Error* Compiler::exprFString() noexcept{
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ctx()->s_push(make_expr<FStringExpr>(std::get<Str>(prev().value)));
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return NULL;
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}
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Error* Compiler::exprLambda() noexcept{
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Error* err;
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FuncDecl_ decl = push_f_context("<lambda>");
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int line = prev().line; // backup line
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if(!match(TK(":"))) {
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check(_compile_f_args(decl, false));
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consume(TK(":"));
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}
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// https://github.com/pocketpy/pocketpy/issues/37
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check(parse_expression(PREC_LAMBDA + 1));
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ctx()->s_emit_top();
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ctx()->emit_(OP_RETURN_VALUE, BC_NOARG, BC_KEEPLINE);
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check(pop_context());
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LambdaExpr* e = make_expr<LambdaExpr>(decl);
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e->line = line;
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprOr() noexcept{
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int line = prev().line;
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Error* err;
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check(parse_expression(PREC_LOGICAL_OR + 1));
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auto e = make_expr<OrExpr>();
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e->line = line;
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e->rhs = ctx()->s_popx();
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e->lhs = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprAnd() noexcept{
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int line = prev().line;
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Error* err;
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check(parse_expression(PREC_LOGICAL_AND + 1));
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auto e = make_expr<AndExpr>();
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e->line = line;
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e->rhs = ctx()->s_popx();
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e->lhs = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprTernary() noexcept{
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// [true_expr]
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Error* err;
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int line = prev().line;
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check(parse_expression(PREC_TERNARY + 1)); // [true_expr, cond]
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consume(TK("else"));
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check(parse_expression(PREC_TERNARY + 1)); // [true_expr, cond, false_expr]
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auto e = make_expr<TernaryExpr>();
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e->line = line;
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e->false_expr = ctx()->s_popx();
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e->cond = ctx()->s_popx();
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e->true_expr = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprBinaryOp() noexcept{
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Error* err;
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int line = prev().line;
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TokenIndex op = prev().type;
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check(parse_expression(rules[op].precedence + 1));
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BinaryExpr* e = make_expr<BinaryExpr>(op);
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e->line = line;
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e->rhs = ctx()->s_popx();
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e->lhs = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprNot() noexcept{
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Error* err;
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check(parse_expression(PREC_LOGICAL_NOT + 1));
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NotExpr* e = make_expr<NotExpr>(ctx()->s_popx());
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprUnaryOp() noexcept{
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Error* err;
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TokenIndex op = prev().type;
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check(parse_expression(PREC_UNARY + 1));
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switch(op) {
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case TK("-"): ctx()->s_push(make_expr<NegatedExpr>(ctx()->s_popx())); break;
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case TK("~"): ctx()->s_push(make_expr<InvertExpr>(ctx()->s_popx())); break;
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case TK("*"): ctx()->s_push(make_expr<StarredExpr>(ctx()->s_popx(), 1)); break;
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case TK("**"): ctx()->s_push(make_expr<StarredExpr>(ctx()->s_popx(), 2)); break;
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default: assert(false);
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}
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return NULL;
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}
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Error* Compiler::exprGroup() noexcept{
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Error* err;
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check_newlines_repl()
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check(EXPR_TUPLE()); // () is just for change precedence
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check_newlines_repl()
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consume(TK(")"));
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if(ctx()->s_top()->is_tuple()) return NULL;
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Expr* g = make_expr<GroupedExpr>(ctx()->s_popx());
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ctx()->s_push(g);
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return NULL;
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}
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Error* Compiler::consume_comp(Opcode op0, Opcode op1) noexcept{
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// [expr]
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Error* err;
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bool has_cond = false;
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check(EXPR_VARS()); // [expr, vars]
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consume(TK("in"));
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check(parse_expression(PREC_TERNARY + 1)); // [expr, vars, iter]
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check_newlines_repl()
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if(match(TK("if"))) {
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check(parse_expression(PREC_TERNARY + 1)); // [expr, vars, iter, cond]
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has_cond = true;
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}
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CompExpr* ce = make_expr<CompExpr>(op0, op1);
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if(has_cond) ce->cond = ctx()->s_popx();
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ce->iter = ctx()->s_popx();
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ce->vars = ctx()->s_popx();
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ce->expr = ctx()->s_popx();
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ctx()->s_push(ce);
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check_newlines_repl()
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return NULL;
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}
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Error* Compiler::exprList() noexcept{
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Error* err;
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int line = prev().line;
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int count = 0;
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do {
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check_newlines_repl()
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if(curr().type == TK("]")) break;
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check(EXPR()); count += 1;
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check_newlines_repl()
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if(count == 1 && match(TK("for"))) {
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check(consume_comp(OP_BUILD_LIST, OP_LIST_APPEND));
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consume(TK("]"));
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return NULL;
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}
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check_newlines_repl()
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} while(match(TK(",")));
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consume(TK("]"));
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ListExpr* e = make_expr<ListExpr>(count);
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e->line = line; // override line
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for(int i=count-1; i>=0; i--)
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e->items[i] = ctx()->s_popx();
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ctx()->s_push(e);
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return NULL;
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}
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Error* Compiler::exprMap() noexcept{
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Error* err;
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bool parsing_dict = false; // {...} may be dict or set
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int count = 0;
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do {
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check_newlines_repl()
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if(curr().type == TK("}")) break;
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check(EXPR()); // [key]
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int star_level = ctx()->s_top()->star_level();
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if(star_level == 2 || curr().type == TK(":")) { parsing_dict = true; }
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if(parsing_dict) {
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if(star_level == 2) {
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DictItemExpr* dict_item = make_expr<DictItemExpr>();
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dict_item->key = NULL;
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dict_item->value = ctx()->s_popx();
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ctx()->s_push(dict_item);
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} else {
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consume(TK(":"));
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check(EXPR());
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DictItemExpr* dict_item = make_expr<DictItemExpr>();
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dict_item->value = ctx()->s_popx();
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dict_item->key = ctx()->s_popx();
|
|
ctx()->s_push(dict_item);
|
|
}
|
|
}
|
|
count += 1;
|
|
check_newlines_repl()
|
|
if(count == 1 && match(TK("for"))) {
|
|
if(parsing_dict){
|
|
check(consume_comp(OP_BUILD_DICT, OP_DICT_ADD));
|
|
}else{
|
|
check(consume_comp(OP_BUILD_SET, OP_SET_ADD));
|
|
}
|
|
consume(TK("}"));
|
|
return NULL;
|
|
}
|
|
check_newlines_repl()
|
|
} while(match(TK(",")));
|
|
consume(TK("}"));
|
|
|
|
SequenceExpr* se;
|
|
if(count == 0 || parsing_dict) {
|
|
se = make_expr<DictExpr>(count);
|
|
} else {
|
|
se = make_expr<SetExpr>(count);
|
|
}
|
|
for(int i=count-1; i>=0; i--)
|
|
se->items[i] = ctx()->s_popx();
|
|
ctx()->s_push(se);
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprCall() noexcept{
|
|
Error* err;
|
|
CallExpr* e = make_expr<CallExpr>();
|
|
e->callable = ctx()->s_popx();
|
|
ctx()->s_push(e); // push onto the stack in advance
|
|
do {
|
|
check_newlines_repl()
|
|
if(curr().type == TK(")")) break;
|
|
if(curr().type == TK("@id") && next().type == TK("=")) {
|
|
consume(TK("@id"));
|
|
StrName key(prev().sv());
|
|
consume(TK("="));
|
|
check(EXPR());
|
|
e->kwargs.push_back({key, ctx()->s_popx()});
|
|
} else {
|
|
check(EXPR());
|
|
if(ctx()->s_top()->star_level() == 2) {
|
|
// **kwargs
|
|
e->kwargs.push_back({"**", ctx()->s_popx()});
|
|
} else {
|
|
// positional argument
|
|
if(!e->kwargs.empty()) return SyntaxError("positional argument follows keyword argument");
|
|
e->args.push_back(ctx()->s_popx());
|
|
}
|
|
}
|
|
check_newlines_repl()
|
|
} while(match(TK(",")));
|
|
consume(TK(")"));
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprName() noexcept{
|
|
StrName name(prev().sv());
|
|
NameScope scope = name_scope();
|
|
if(ctx()->global_names.contains(name)) { scope = NAME_GLOBAL; }
|
|
ctx()->s_push(make_expr<NameExpr>(name, scope));
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprAttrib() noexcept{
|
|
consume(TK("@id"));
|
|
ctx()->s_push(make_expr<AttribExpr>(ctx()->s_popx(), StrName::get(prev().sv())));
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprSlice0() noexcept{
|
|
Error* err;
|
|
SliceExpr* slice = make_expr<SliceExpr>();
|
|
ctx()->s_push(slice); // push onto the stack in advance
|
|
if(is_expression()) { // :<stop>
|
|
check(EXPR());
|
|
slice->stop = ctx()->s_popx();
|
|
// try optional step
|
|
if(match(TK(":"))) { // :<stop>:<step>
|
|
check(EXPR());
|
|
slice->step = ctx()->s_popx();
|
|
}
|
|
} else if(match(TK(":"))) {
|
|
if(is_expression()) { // ::<step>
|
|
check(EXPR());
|
|
slice->step = ctx()->s_popx();
|
|
} // else ::
|
|
} // else :
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprSlice1() noexcept{
|
|
Error* err;
|
|
SliceExpr* slice = make_expr<SliceExpr>();
|
|
slice->start = ctx()->s_popx();
|
|
ctx()->s_push(slice); // push onto the stack in advance
|
|
if(is_expression()) { // <start>:<stop>
|
|
check(EXPR());
|
|
slice->stop = ctx()->s_popx();
|
|
// try optional step
|
|
if(match(TK(":"))) { // <start>:<stop>:<step>
|
|
check(EXPR());
|
|
slice->step = ctx()->s_popx();
|
|
}
|
|
} else if(match(TK(":"))) { // <start>::<step>
|
|
check(EXPR());
|
|
slice->step = ctx()->s_popx();
|
|
} // else <start>:
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprSubscr() noexcept{
|
|
Error* err;
|
|
int line = prev().line;
|
|
check_newlines_repl()
|
|
check(EXPR_TUPLE(true));
|
|
check_newlines_repl()
|
|
consume(TK("]")); // [lhs, rhs]
|
|
SubscrExpr* e = make_expr<SubscrExpr>();
|
|
e->line = line;
|
|
e->rhs = ctx()->s_popx(); // [lhs]
|
|
e->lhs = ctx()->s_popx(); // []
|
|
ctx()->s_push(e);
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::exprLiteral0() noexcept{
|
|
ctx()->s_push(make_expr<Literal0Expr>(prev().type));
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_block_body(PrattCallback callback) noexcept{
|
|
Error* err;
|
|
if(!callback) callback = &Compiler::compile_stmt;
|
|
consume(TK(":"));
|
|
if(curr().type != TK("@eol") && curr().type != TK("@eof")) {
|
|
while(true) {
|
|
check(compile_stmt());
|
|
bool possible = curr().type != TK("@eol") && curr().type != TK("@eof");
|
|
if(prev().type != TK(";") || !possible) break;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
bool need_more_lines;
|
|
bool consumed = match_newlines(&need_more_lines);
|
|
if(need_more_lines) return NeedMoreLines();
|
|
if(!consumed) return SyntaxError("expected a new line after ':'");
|
|
|
|
consume(TK("@indent"));
|
|
while(curr().type != TK("@dedent")) {
|
|
match_newlines();
|
|
check((this->*callback)());
|
|
match_newlines();
|
|
}
|
|
consume(TK("@dedent"));
|
|
return NULL;
|
|
}
|
|
|
|
// import a [as b]
|
|
// import a [as b], c [as d]
|
|
Error* Compiler::compile_normal_import() noexcept{
|
|
do {
|
|
consume(TK("@id"));
|
|
Str name = prev().str();
|
|
ctx()->emit_(OP_IMPORT_PATH, ctx()->add_const_string(name.sv()), prev().line);
|
|
if(match(TK("as"))) {
|
|
consume(TK("@id"));
|
|
name = prev().str();
|
|
}
|
|
ctx()->emit_store_name(name_scope(), StrName(name), prev().line);
|
|
} while(match(TK(",")));
|
|
consume_end_stmt();
|
|
return NULL;
|
|
}
|
|
|
|
// from a import b [as c], d [as e]
|
|
// from a.b import c [as d]
|
|
// from . import a [as b]
|
|
// from .a import b [as c]
|
|
// from ..a import b [as c]
|
|
// from .a.b import c [as d]
|
|
// from xxx import *
|
|
Error* Compiler::compile_from_import() noexcept{
|
|
int dots = 0;
|
|
|
|
while(true) {
|
|
switch(curr().type) {
|
|
case TK("."): dots += 1; break;
|
|
case TK(".."): dots += 2; break;
|
|
case TK("..."): dots += 3; break;
|
|
default: goto __EAT_DOTS_END;
|
|
}
|
|
advance();
|
|
}
|
|
__EAT_DOTS_END:
|
|
SStream ss;
|
|
for(int i = 0; i < dots; i++)
|
|
ss << '.';
|
|
|
|
if(dots > 0) {
|
|
// @id is optional if dots > 0
|
|
if(match(TK("@id"))) {
|
|
ss << prev().sv();
|
|
while(match(TK("."))) {
|
|
consume(TK("@id"));
|
|
ss << "." << prev().sv();
|
|
}
|
|
}
|
|
} else {
|
|
// @id is required if dots == 0
|
|
consume(TK("@id"));
|
|
ss << prev().sv();
|
|
while(match(TK("."))) {
|
|
consume(TK("@id"));
|
|
ss << "." << prev().sv();
|
|
}
|
|
}
|
|
|
|
ctx()->emit_(OP_IMPORT_PATH, ctx()->add_const_string(ss.str().sv()), prev().line);
|
|
consume(TK("import"));
|
|
|
|
if(match(TK("*"))) {
|
|
if(name_scope() != NAME_GLOBAL) return SyntaxError("from <module> import * can only be used in global scope");
|
|
// pop the module and import __all__
|
|
ctx()->emit_(OP_POP_IMPORT_STAR, BC_NOARG, prev().line);
|
|
consume_end_stmt();
|
|
return NULL;
|
|
}
|
|
|
|
do {
|
|
ctx()->emit_(OP_DUP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
consume(TK("@id"));
|
|
Str name = prev().str();
|
|
ctx()->emit_(OP_LOAD_ATTR, StrName(name).index, prev().line);
|
|
if(match(TK("as"))) {
|
|
consume(TK("@id"));
|
|
name = prev().str();
|
|
}
|
|
ctx()->emit_store_name(name_scope(), StrName(name), prev().line);
|
|
} while(match(TK(",")));
|
|
ctx()->emit_(OP_POP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
consume_end_stmt();
|
|
return NULL;
|
|
}
|
|
|
|
bool Compiler::is_expression(bool allow_slice) noexcept{
|
|
PrattCallback prefix = rules[curr().type].prefix;
|
|
return prefix != nullptr && (allow_slice || curr().type != TK(":"));
|
|
}
|
|
|
|
Error* Compiler::parse_expression(int precedence, bool allow_slice) noexcept{
|
|
PrattCallback prefix = rules[curr().type].prefix;
|
|
if(prefix == nullptr || (curr().type == TK(":") && !allow_slice)) {
|
|
return SyntaxError("expected an expression, got %s", TK_STR(curr().type));
|
|
}
|
|
advance();
|
|
Error* err;
|
|
check((this->*prefix)());
|
|
while(rules[curr().type].precedence >= precedence && (allow_slice || curr().type != TK(":"))) {
|
|
TokenIndex op = curr().type;
|
|
advance();
|
|
PrattCallback infix = rules[op].infix;
|
|
assert(infix != nullptr);
|
|
check((this->*infix)());
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_if_stmt() noexcept{
|
|
Error* err;
|
|
check(EXPR()); // condition
|
|
ctx()->s_emit_top();
|
|
int patch = ctx()->emit_(OP_POP_JUMP_IF_FALSE, BC_NOARG, prev().line);
|
|
err = compile_block_body();
|
|
if(err) return err;
|
|
if(match(TK("elif"))) {
|
|
int exit_patch = ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, prev().line);
|
|
ctx()->patch_jump(patch);
|
|
check(compile_if_stmt());
|
|
ctx()->patch_jump(exit_patch);
|
|
} else if(match(TK("else"))) {
|
|
int exit_patch = ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, prev().line);
|
|
ctx()->patch_jump(patch);
|
|
check(compile_block_body());
|
|
ctx()->patch_jump(exit_patch);
|
|
} else {
|
|
ctx()->patch_jump(patch);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_while_loop() noexcept{
|
|
Error* err;
|
|
CodeBlock* block = ctx()->enter_block(CodeBlockType::WHILE_LOOP);
|
|
check(EXPR()); // condition
|
|
ctx()->s_emit_top();
|
|
int patch = ctx()->emit_(OP_POP_JUMP_IF_FALSE, BC_NOARG, prev().line);
|
|
check(compile_block_body());
|
|
ctx()->emit_(OP_LOOP_CONTINUE, ctx()->get_loop(), BC_KEEPLINE, true);
|
|
ctx()->patch_jump(patch);
|
|
ctx()->exit_block();
|
|
// optional else clause
|
|
if(match(TK("else"))) {
|
|
check(compile_block_body());
|
|
block->end2 = ctx()->co->codes.size();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_for_loop() noexcept{
|
|
Error* err;
|
|
check(EXPR_VARS()); // [vars]
|
|
consume(TK("in"));
|
|
check(EXPR_TUPLE()); // [vars, iter]
|
|
ctx()->s_emit_top(); // [vars]
|
|
ctx()->emit_(OP_GET_ITER_NEW, BC_NOARG, BC_KEEPLINE);
|
|
CodeBlock* block = ctx()->enter_block(CodeBlockType::FOR_LOOP);
|
|
int for_codei = ctx()->emit_(OP_FOR_ITER, ctx()->curr_iblock, BC_KEEPLINE);
|
|
Expr* vars = ctx()->s_popx();
|
|
bool ok = vars->emit_store(ctx());
|
|
delete_expr(vars);
|
|
if(!ok) return SyntaxError(); // this error occurs in `vars` instead of this line, but...nevermind
|
|
ctx()->try_merge_for_iter_store(for_codei);
|
|
check(compile_block_body());
|
|
ctx()->emit_(OP_LOOP_CONTINUE, ctx()->get_loop(), BC_KEEPLINE, true);
|
|
ctx()->exit_block();
|
|
// optional else clause
|
|
if(match(TK("else"))) {
|
|
check(compile_block_body());
|
|
block->end2 = ctx()->co->codes.size();
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_try_except() noexcept{
|
|
Error* err;
|
|
ctx()->enter_block(CodeBlockType::TRY_EXCEPT);
|
|
ctx()->emit_(OP_TRY_ENTER, BC_NOARG, prev().line);
|
|
check(compile_block_body());
|
|
small_vector_2<int, 8> patches;
|
|
patches.push_back(ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, BC_KEEPLINE));
|
|
ctx()->exit_block();
|
|
|
|
int finally_entry = -1;
|
|
if(curr().type != TK("finally")) {
|
|
do {
|
|
StrName as_name;
|
|
consume(TK("except"));
|
|
if(is_expression()) {
|
|
check(EXPR()); // push assumed type on to the stack
|
|
ctx()->s_emit_top();
|
|
ctx()->emit_(OP_EXCEPTION_MATCH, BC_NOARG, prev().line);
|
|
if(match(TK("as"))) {
|
|
consume(TK("@id"));
|
|
as_name = StrName(prev().sv());
|
|
}
|
|
} else {
|
|
ctx()->emit_(OP_LOAD_TRUE, BC_NOARG, BC_KEEPLINE);
|
|
}
|
|
int patch = ctx()->emit_(OP_POP_JUMP_IF_FALSE, BC_NOARG, BC_KEEPLINE);
|
|
// on match
|
|
if(!as_name.empty()) {
|
|
ctx()->emit_(OP_DUP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
ctx()->emit_store_name(name_scope(), as_name, BC_KEEPLINE);
|
|
}
|
|
// pop the exception
|
|
ctx()->emit_(OP_POP_EXCEPTION, BC_NOARG, BC_KEEPLINE);
|
|
check(compile_block_body());
|
|
patches.push_back(ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, BC_KEEPLINE));
|
|
ctx()->patch_jump(patch);
|
|
} while(curr().type == TK("except"));
|
|
}
|
|
|
|
if(match(TK("finally"))) {
|
|
int patch = ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, BC_KEEPLINE);
|
|
finally_entry = ctx()->co->codes.size();
|
|
check(compile_block_body());
|
|
ctx()->emit_(OP_JUMP_ABSOLUTE_TOP, BC_NOARG, BC_KEEPLINE);
|
|
ctx()->patch_jump(patch);
|
|
}
|
|
// no match, re-raise
|
|
if(finally_entry != -1) {
|
|
i64 target = ctx()->co->codes.size() + 2;
|
|
ctx()->emit_(OP_LOAD_CONST, ctx()->add_const(VAR(target)), BC_KEEPLINE);
|
|
int i = ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, BC_KEEPLINE);
|
|
ctx()->co->codes[i].set_signed_arg(finally_entry - i);
|
|
}
|
|
ctx()->emit_(OP_RE_RAISE, BC_NOARG, BC_KEEPLINE);
|
|
|
|
// no exception or no match, jump to the end
|
|
for(int patch: patches)
|
|
ctx()->patch_jump(patch);
|
|
if(finally_entry != -1) {
|
|
i64 target = ctx()->co->codes.size() + 2;
|
|
ctx()->emit_(OP_LOAD_CONST, ctx()->add_const(VAR(target)), BC_KEEPLINE);
|
|
int i = ctx()->emit_(OP_JUMP_FORWARD, BC_NOARG, BC_KEEPLINE);
|
|
ctx()->co->codes[i].set_signed_arg(finally_entry - i);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_decorated() noexcept{
|
|
Error* err;
|
|
int count = 0;
|
|
do {
|
|
check(EXPR());
|
|
count += 1;
|
|
bool need_more_lines;
|
|
bool consumed = match_newlines(&need_more_lines);
|
|
if(need_more_lines) return NeedMoreLines();
|
|
if(!consumed) return SyntaxError("expected a newline after '@'");
|
|
} while(match(TK("@")));
|
|
|
|
if(match(TK("class"))) {
|
|
check(compile_class(count));
|
|
} else {
|
|
consume(TK("def"));
|
|
check(compile_function(count));
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::try_compile_assignment(bool* is_assign) noexcept{
|
|
Error* err;
|
|
switch(curr().type) {
|
|
case TK("+="):
|
|
case TK("-="):
|
|
case TK("*="):
|
|
case TK("/="):
|
|
case TK("//="):
|
|
case TK("%="):
|
|
case TK("<<="):
|
|
case TK(">>="):
|
|
case TK("&="):
|
|
case TK("|="):
|
|
case TK("^="): {
|
|
if(ctx()->s_top()->is_starred()) return SyntaxError();
|
|
if(ctx()->is_compiling_class){
|
|
return SyntaxError("can't use inplace operator in class definition");
|
|
}
|
|
advance();
|
|
// a[x] += 1; a and x should be evaluated only once
|
|
// a.x += 1; a should be evaluated only once
|
|
// -1 to remove =; inplace=true
|
|
int line = prev().line;
|
|
TokenIndex op = prev().type-1;
|
|
// [lhs]
|
|
check(EXPR_TUPLE()); // [lhs, rhs]
|
|
if(ctx()->s_top()->is_starred()) return SyntaxError();
|
|
BinaryExpr* e = make_expr<BinaryExpr>(op, true);
|
|
e->line = line;
|
|
e->rhs = ctx()->s_popx(); // [lhs]
|
|
e->lhs = ctx()->s_popx(); // []
|
|
e->emit_(ctx());
|
|
bool ok = e->lhs->emit_store_inplace(ctx());
|
|
delete_expr(e);
|
|
if(!ok) return SyntaxError();
|
|
*is_assign = true;
|
|
return NULL;
|
|
}
|
|
case TK("="): {
|
|
int n = 0;
|
|
while(match(TK("="))) {
|
|
check(EXPR_TUPLE());
|
|
n += 1;
|
|
}
|
|
// stack size is n+1
|
|
ctx()->s_emit_top(); // emit and pop
|
|
for(int j = 1; j < n; j++)
|
|
ctx()->emit_(OP_DUP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
for(int j = 0; j < n; j++) {
|
|
if(ctx()->s_top()->is_starred()) return SyntaxError();
|
|
bool ok = ctx()->s_top()->emit_store(ctx());
|
|
ctx()->s_pop();
|
|
if(!ok) return SyntaxError();
|
|
}
|
|
*is_assign = true;
|
|
return NULL;
|
|
}
|
|
default: *is_assign = false;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_stmt() noexcept{
|
|
Error* err;
|
|
if(match(TK("class"))) {
|
|
check(compile_class());
|
|
return NULL;
|
|
}
|
|
advance();
|
|
int kw_line = prev().line; // backup line number
|
|
int curr_loop_block = ctx()->get_loop();
|
|
switch(prev().type) {
|
|
case TK("break"):
|
|
if(curr_loop_block < 0) return SyntaxError("'break' outside loop");
|
|
ctx()->emit_(OP_LOOP_BREAK, curr_loop_block, kw_line);
|
|
consume_end_stmt();
|
|
break;
|
|
case TK("continue"):
|
|
if(curr_loop_block < 0) return SyntaxError("'continue' not properly in loop");
|
|
ctx()->emit_(OP_LOOP_CONTINUE, curr_loop_block, kw_line);
|
|
consume_end_stmt();
|
|
break;
|
|
case TK("yield"):
|
|
if(contexts.size() <= 1) return SyntaxError("'yield' outside function");
|
|
check(EXPR_TUPLE());
|
|
ctx()->s_emit_top();
|
|
ctx()->emit_(OP_YIELD_VALUE, BC_NOARG, kw_line);
|
|
consume_end_stmt();
|
|
break;
|
|
case TK("yield from"):
|
|
if(contexts.size() <= 1) return SyntaxError("'yield from' outside function");
|
|
check(EXPR_TUPLE());
|
|
ctx()->s_emit_top();
|
|
|
|
ctx()->emit_(OP_GET_ITER_NEW, BC_NOARG, kw_line);
|
|
ctx()->enter_block(CodeBlockType::FOR_LOOP);
|
|
ctx()->emit_(OP_FOR_ITER_YIELD_VALUE, BC_NOARG, kw_line);
|
|
ctx()->emit_(OP_LOOP_CONTINUE, ctx()->get_loop(), kw_line);
|
|
ctx()->exit_block();
|
|
consume_end_stmt();
|
|
break;
|
|
case TK("return"):
|
|
if(contexts.size() <= 1) return SyntaxError("'return' outside function");
|
|
if(match_end_stmt()) {
|
|
ctx()->emit_(OP_RETURN_VALUE, 1, kw_line);
|
|
} else {
|
|
check(EXPR_TUPLE());
|
|
ctx()->s_emit_top();
|
|
consume_end_stmt();
|
|
ctx()->emit_(OP_RETURN_VALUE, BC_NOARG, kw_line);
|
|
}
|
|
break;
|
|
/*************************************************/
|
|
case TK("if"): check(compile_if_stmt()); break;
|
|
case TK("while"): check(compile_while_loop()); break;
|
|
case TK("for"): check(compile_for_loop()); break;
|
|
case TK("import"): check(compile_normal_import()); break;
|
|
case TK("from"): check(compile_from_import()); break;
|
|
case TK("def"): check(compile_function()); break;
|
|
case TK("@"): check(compile_decorated()); break;
|
|
case TK("try"): check(compile_try_except()); break;
|
|
case TK("pass"): consume_end_stmt(); break;
|
|
/*************************************************/
|
|
case TK("assert"): {
|
|
check(EXPR()); // condition
|
|
ctx()->s_emit_top();
|
|
int index = ctx()->emit_(OP_POP_JUMP_IF_TRUE, BC_NOARG, kw_line);
|
|
int has_msg = 0;
|
|
if(match(TK(","))) {
|
|
check(EXPR()); // message
|
|
ctx()->s_emit_top();
|
|
has_msg = 1;
|
|
}
|
|
ctx()->emit_(OP_RAISE_ASSERT, has_msg, kw_line);
|
|
ctx()->patch_jump(index);
|
|
consume_end_stmt();
|
|
break;
|
|
}
|
|
case TK("global"):
|
|
do {
|
|
consume(TK("@id"));
|
|
ctx()->global_names.push_back(StrName(prev().sv()));
|
|
} while(match(TK(",")));
|
|
consume_end_stmt();
|
|
break;
|
|
case TK("raise"): {
|
|
check(EXPR());
|
|
ctx()->s_emit_top();
|
|
ctx()->emit_(OP_RAISE, BC_NOARG, kw_line);
|
|
consume_end_stmt();
|
|
} break;
|
|
case TK("del"): {
|
|
check(EXPR_TUPLE());
|
|
if(!ctx()->s_top()->emit_del(ctx())) return SyntaxError();
|
|
ctx()->s_pop();
|
|
consume_end_stmt();
|
|
} break;
|
|
case TK("with"): {
|
|
check(EXPR()); // [ <expr> ]
|
|
ctx()->s_emit_top();
|
|
ctx()->enter_block(CodeBlockType::CONTEXT_MANAGER);
|
|
Expr* as_name = nullptr;
|
|
if(match(TK("as"))) {
|
|
consume(TK("@id"));
|
|
as_name = make_expr<NameExpr>(prev().str(), name_scope());
|
|
}
|
|
ctx()->emit_(OP_WITH_ENTER, BC_NOARG, prev().line);
|
|
// [ <expr> <expr>.__enter__() ]
|
|
if(as_name) {
|
|
bool ok = as_name->emit_store(ctx());
|
|
delete_expr(as_name);
|
|
if(!ok) return SyntaxError();
|
|
} else {
|
|
ctx()->emit_(OP_POP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
}
|
|
check(compile_block_body());
|
|
ctx()->emit_(OP_WITH_EXIT, BC_NOARG, prev().line);
|
|
ctx()->exit_block();
|
|
} break;
|
|
/*************************************************/
|
|
case TK("=="): {
|
|
consume(TK("@id"));
|
|
if(mode() != EXEC_MODE) return SyntaxError("'label' is only available in EXEC_MODE");
|
|
if(!ctx()->add_label(prev().str())) {
|
|
Str escaped(prev().str().escape());
|
|
return SyntaxError("label %s already exists", escaped.c_str());
|
|
}
|
|
consume(TK("=="));
|
|
consume_end_stmt();
|
|
} break;
|
|
case TK("->"):
|
|
consume(TK("@id"));
|
|
if(mode() != EXEC_MODE) return SyntaxError("'goto' is only available in EXEC_MODE");
|
|
ctx()->emit_(OP_GOTO, StrName(prev().sv()).index, prev().line);
|
|
consume_end_stmt();
|
|
break;
|
|
/*************************************************/
|
|
// handle dangling expression or assignment
|
|
default: {
|
|
advance(-1); // do revert since we have pre-called advance() at the beginning
|
|
check(EXPR_TUPLE());
|
|
|
|
bool is_typed_name = false; // e.g. x: int
|
|
// eat variable's type hint if it is a single name
|
|
if(ctx()->s_top()->is_name()) {
|
|
if(match(TK(":"))) {
|
|
check(consume_type_hints());
|
|
is_typed_name = true;
|
|
|
|
if(ctx()->is_compiling_class) {
|
|
NameExpr* ne = static_cast<NameExpr*>(ctx()->s_top());
|
|
ctx()->emit_(OP_ADD_CLASS_ANNOTATION, ne->name.index, BC_KEEPLINE);
|
|
}
|
|
}
|
|
}
|
|
bool is_assign = false;
|
|
check(try_compile_assignment(&is_assign));
|
|
if(!is_assign) {
|
|
if(ctx()->s_size() > 0 && ctx()->s_top()->is_starred()) {
|
|
return SyntaxError();
|
|
}
|
|
if(!is_typed_name) {
|
|
ctx()->s_emit_top();
|
|
if((mode() == CELL_MODE || mode() == REPL_MODE) && name_scope() == NAME_GLOBAL) {
|
|
ctx()->emit_(OP_PRINT_EXPR, BC_NOARG, BC_KEEPLINE);
|
|
} else {
|
|
ctx()->emit_(OP_POP_TOP, BC_NOARG, BC_KEEPLINE);
|
|
}
|
|
} else {
|
|
ctx()->s_pop();
|
|
}
|
|
}
|
|
consume_end_stmt();
|
|
break;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::consume_type_hints() noexcept{
|
|
Error* err;
|
|
check(EXPR());
|
|
ctx()->s_pop();
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_class(int decorators) noexcept{
|
|
Error* err;
|
|
consume(TK("@id"));
|
|
int namei = StrName(prev().sv()).index;
|
|
bool has_base = false;
|
|
if(match(TK("("))) {
|
|
if(is_expression()) {
|
|
check(EXPR());
|
|
has_base = true; // [base]
|
|
}
|
|
consume(TK(")"));
|
|
}
|
|
if(!has_base) {
|
|
ctx()->emit_(OP_LOAD_NONE, BC_NOARG, prev().line);
|
|
} else {
|
|
ctx()->s_emit_top(); // []
|
|
}
|
|
ctx()->emit_(OP_BEGIN_CLASS, namei, BC_KEEPLINE);
|
|
|
|
for(auto& c: this->contexts) {
|
|
if(c.is_compiling_class) return SyntaxError("nested class is not allowed");
|
|
}
|
|
ctx()->is_compiling_class = true;
|
|
check(compile_block_body());
|
|
ctx()->is_compiling_class = false;
|
|
|
|
if(decorators > 0) {
|
|
ctx()->emit_(OP_BEGIN_CLASS_DECORATION, BC_NOARG, BC_KEEPLINE);
|
|
ctx()->s_emit_decorators(decorators);
|
|
ctx()->emit_(OP_END_CLASS_DECORATION, BC_NOARG, BC_KEEPLINE);
|
|
}
|
|
|
|
ctx()->emit_(OP_END_CLASS, namei, BC_KEEPLINE);
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::_compile_f_args(FuncDecl_ decl, bool enable_type_hints) noexcept{
|
|
int state = 0; // 0 for args, 1 for *args, 2 for k=v, 3 for **kwargs
|
|
Error* err;
|
|
do {
|
|
if(state > 3) return SyntaxError();
|
|
if(state == 3) return SyntaxError("**kwargs should be the last argument");
|
|
match_newlines();
|
|
if(match(TK("*"))) {
|
|
if(state < 1)
|
|
state = 1;
|
|
else
|
|
return SyntaxError("*args should be placed before **kwargs");
|
|
} else if(match(TK("**"))) {
|
|
state = 3;
|
|
}
|
|
consume(TK("@id"));
|
|
StrName name(prev().sv());
|
|
|
|
// check duplicate argument name
|
|
for(int j: decl->args) {
|
|
if(decl->code->varnames[j] == name) return SyntaxError("duplicate argument name");
|
|
}
|
|
for(auto& kv: decl->kwargs) {
|
|
if(decl->code->varnames[kv.index] == name) return SyntaxError("duplicate argument name");
|
|
}
|
|
if(decl->starred_arg != -1 && decl->code->varnames[decl->starred_arg] == name) {
|
|
return SyntaxError("duplicate argument name");
|
|
}
|
|
if(decl->starred_kwarg != -1 && decl->code->varnames[decl->starred_kwarg] == name) {
|
|
return SyntaxError("duplicate argument name");
|
|
}
|
|
|
|
// eat type hints
|
|
if(enable_type_hints && match(TK(":"))) check(consume_type_hints());
|
|
if(state == 0 && curr().type == TK("=")) state = 2;
|
|
int index = ctx()->add_varname(name);
|
|
switch(state) {
|
|
case 0: decl->args.push_back(index); break;
|
|
case 1:
|
|
decl->starred_arg = index;
|
|
state += 1;
|
|
break;
|
|
case 2: {
|
|
consume(TK("="));
|
|
PyVar value;
|
|
check(read_literal(&value));
|
|
if(value == nullptr) return SyntaxError("default argument must be a literal");
|
|
decl->add_kwarg(index, name, value);
|
|
} break;
|
|
case 3:
|
|
decl->starred_kwarg = index;
|
|
state += 1;
|
|
break;
|
|
}
|
|
} while(match(TK(",")));
|
|
return NULL;
|
|
}
|
|
|
|
Error* Compiler::compile_function(int decorators) noexcept{
|
|
Error* err;
|
|
consume(TK("@id"));
|
|
Str decl_name = prev().str();
|
|
FuncDecl_ decl = push_f_context(decl_name);
|
|
consume(TK("("));
|
|
if(!match(TK(")"))) {
|
|
check(_compile_f_args(decl, true));
|
|
consume(TK(")"));
|
|
}
|
|
if(match(TK("->"))) check(consume_type_hints());
|
|
check(compile_block_body());
|
|
check(pop_context());
|
|
|
|
decl->docstring = nullptr;
|
|
if(decl->code->codes.size() >= 2 && decl->code->codes[0].op == OP_LOAD_CONST &&
|
|
decl->code->codes[1].op == OP_POP_TOP) {
|
|
PyVar c = decl->code->consts[decl->code->codes[0].arg];
|
|
if(is_type(c, vm->tp_str)) {
|
|
decl->code->codes[0].op = OP_NO_OP;
|
|
decl->code->codes[1].op = OP_NO_OP;
|
|
decl->docstring = PK_OBJ_GET(Str, c).c_str();
|
|
}
|
|
}
|
|
ctx()->emit_(OP_LOAD_FUNCTION, ctx()->add_func_decl(decl), prev().line);
|
|
|
|
ctx()->s_emit_decorators(decorators);
|
|
|
|
if(!ctx()->is_compiling_class) {
|
|
NameExpr* e = make_expr<NameExpr>(decl_name, name_scope());
|
|
e->emit_store(ctx());
|
|
delete_expr(e);
|
|
} else {
|
|
int index = StrName(decl_name).index;
|
|
ctx()->emit_(OP_STORE_CLASS_ATTR, index, prev().line);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
PyVar Compiler::to_object(const TokenValue& value) noexcept{
|
|
PyVar obj = nullptr;
|
|
if(std::holds_alternative<i64>(value)) { obj = VAR(std::get<i64>(value)); }
|
|
if(std::holds_alternative<f64>(value)) { obj = VAR(std::get<f64>(value)); }
|
|
if(std::holds_alternative<Str>(value)) { obj = VAR(std::get<Str>(value)); }
|
|
assert(obj != nullptr);
|
|
return obj;
|
|
}
|
|
|
|
Error* Compiler::read_literal(PyVar* out) noexcept{
|
|
Error* err;
|
|
advance();
|
|
switch(prev().type) {
|
|
case TK("-"): {
|
|
consume(TK("@num"));
|
|
PyVar val = to_object(prev().value);
|
|
*out = vm->py_negate(val);
|
|
return NULL;
|
|
}
|
|
case TK("@num"): *out = to_object(prev().value); return NULL;
|
|
case TK("@str"): *out = to_object(prev().value); return NULL;
|
|
case TK("True"): *out = VAR(true); return NULL;
|
|
case TK("False"): *out = VAR(false); return NULL;
|
|
case TK("None"): *out = vm->None; return NULL;
|
|
case TK("..."): *out = vm->Ellipsis; return NULL;
|
|
case TK("("): {
|
|
List cpnts;
|
|
while(true) {
|
|
PyVar elem;
|
|
check(read_literal(&elem));
|
|
cpnts.push_back(elem);
|
|
if(curr().type == TK(")")) break;
|
|
consume(TK(","));
|
|
if(curr().type == TK(")")) break;
|
|
}
|
|
consume(TK(")"));
|
|
*out = VAR(cpnts.to_tuple());
|
|
return NULL;
|
|
}
|
|
default: *out = nullptr; return NULL;
|
|
}
|
|
}
|
|
|
|
Compiler::Compiler(VM* vm, std::string_view source, const Str& filename, CompileMode mode, bool unknown_global_scope) noexcept:
|
|
lexer(vm, source, filename, mode){
|
|
this->vm = vm;
|
|
this->unknown_global_scope = unknown_global_scope;
|
|
init_pratt_rules();
|
|
}
|
|
|
|
Error* Compiler::compile(CodeObject_* out) noexcept{
|
|
assert(__i == 0); // make sure it is the first time to compile
|
|
|
|
Error* err;
|
|
check(lexer.run());
|
|
|
|
// if(lexer.src.filename()[0] != '<'){
|
|
// printf("%s\n", lexer.src.filename().c_str());
|
|
// for(int i=0; i<lexer.nexts.size(); i++){
|
|
// printf("%s: %s\n", TK_STR(tk(i).type), tk(i).str().escape().c_str());
|
|
// }
|
|
// }
|
|
|
|
CodeObject_ code = push_global_context();
|
|
|
|
assert(curr().type == TK("@sof"));
|
|
advance(); // skip @sof, so prev() is always valid
|
|
match_newlines(); // skip possible leading '\n'
|
|
|
|
if(mode() == EVAL_MODE) {
|
|
check(EXPR_TUPLE());
|
|
ctx()->s_emit_top();
|
|
consume(TK("@eof"));
|
|
ctx()->emit_(OP_RETURN_VALUE, BC_NOARG, BC_KEEPLINE);
|
|
check(pop_context());
|
|
*out = code;
|
|
return NULL;
|
|
} else if(mode() == JSON_MODE) {
|
|
check(EXPR());
|
|
Expr* e = ctx()->s_popx();
|
|
if(!e->is_json_object()) return SyntaxError("expect a JSON object, literal or array");
|
|
consume(TK("@eof"));
|
|
e->emit_(ctx());
|
|
ctx()->emit_(OP_RETURN_VALUE, BC_NOARG, BC_KEEPLINE);
|
|
check(pop_context());
|
|
*out = code;
|
|
return NULL;
|
|
}
|
|
|
|
while(!match(TK("@eof"))) {
|
|
check(compile_stmt());
|
|
match_newlines();
|
|
}
|
|
check(pop_context());
|
|
*out = code;
|
|
return NULL;
|
|
}
|
|
|
|
Compiler::~Compiler(){
|
|
for(CodeEmitContext& ctx: contexts){
|
|
ctx.s_clean();
|
|
}
|
|
}
|
|
|
|
Error* Compiler::SyntaxError(const char* msg, ...) noexcept{
|
|
va_list args;
|
|
va_start(args, msg);
|
|
Error* e = lexer._error(false, "SyntaxError", msg, &args);
|
|
e->lineno = err().line;
|
|
e->cursor = err().start;
|
|
va_end(args);
|
|
return e;
|
|
}
|
|
|
|
#undef consume
|
|
#undef consume_end_stmt
|
|
#undef check
|
|
#undef check_newlines_repl
|
|
|
|
} // namespace pkpy
|