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https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
a77ddd028e
Adds: - UnaryOperator: AST node for unary operators -, ++, --, and so forth - UnaryOperatorOptimizer: optimizes a unary operator with its operand - now integer and float negation, and integer inversion - later x[y]++ to a single instruction Also: - automatically include basic.em, which includes some parameter defaults like -1. This allows the compiler to generate output for a hello, world script with the exact same .ecl output as the legacy compiler.
62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
#include "UnaryOperatorOptimizer.h"
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#include "compiler/ast/FloatValue.h"
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#include "compiler/ast/IntegerValue.h"
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#include "compiler/ast/UnaryOperator.h"
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namespace Pol::Bscript::Compiler
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{
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UnaryOperatorOptimizer::UnaryOperatorOptimizer( UnaryOperator& unary_operator )
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: unary_operator( unary_operator )
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{
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}
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std::unique_ptr<Expression> UnaryOperatorOptimizer::optimize()
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{
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unary_operator.operand().accept( *this );
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return std::move( optimized_result );
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}
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void UnaryOperatorOptimizer::visit_children( Node& ) {}
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void UnaryOperatorOptimizer::visit_float_value( FloatValue& fv )
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{
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double value;
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switch ( unary_operator.token_id )
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{
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case TOK_UNMINUS:
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value = -fv.value;
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break;
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default:
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return;
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}
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optimized_result = std::make_unique<FloatValue>( fv.source_location, value );
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}
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void UnaryOperatorOptimizer::visit_integer_value( IntegerValue& iv )
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{
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int value;
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switch ( unary_operator.token_id )
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{
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case TOK_UNMINUS:
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value = -iv.value;
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break;
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case TOK_LOG_NOT:
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value = !iv.value;
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break;
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case TOK_BITWISE_NOT:
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value = static_cast<int>( ~static_cast<unsigned>( iv.value ) );
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break;
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default:
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return;
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}
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optimized_result = std::make_unique<IntegerValue>( iv.source_location, value );
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}
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} // namespace Pol::Bscript::Compiler
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