mirror of
https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
9bbc0518f8
Adds support for var statements at the global level. Adds: - analyzer/Variables: keeps track of the variables in scope (either local or global). - ast/Identifier: AST node for an identifier. - The optimizer will replace constant identifiers with their constant value (in a later commit). - The semantic analyzer will set the variable field for local or global variable identifiers. - ast/VarStatement: AST node for a var statement. - A single var statement will generate one VarStatement per variable declared. - model/Variable: Describes a variable, including its index within its scope.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
#include "SimpleStatementBuilder.h"
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#include "compiler/Report.h"
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#include "compiler/ast/Expression.h"
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#include "compiler/ast/StringValue.h"
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#include "compiler/ast/ValueConsumer.h"
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#include "compiler/ast/VarStatement.h"
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#include "compiler/astbuilder/BuilderWorkspace.h"
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#include "compiler/model/CompilerWorkspace.h"
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using EscriptGrammar::EscriptParser;
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namespace Pol::Bscript::Compiler
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{
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SimpleStatementBuilder::SimpleStatementBuilder( const SourceFileIdentifier& source_file_identifier,
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BuilderWorkspace& workspace )
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: ExpressionBuilder( source_file_identifier, workspace )
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{
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}
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void SimpleStatementBuilder::add_var_statements(
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EscriptParser::VarStatementContext* ctx, std::vector<std::unique_ptr<Statement>>& statements )
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{
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if ( auto variable_declaration_list = ctx->variableDeclarationList() )
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{
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for ( auto decl : variable_declaration_list->variableDeclaration() )
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{
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auto loc = location_for( *decl );
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std::string name = text( decl->IDENTIFIER() );
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std::unique_ptr<VarStatement> var_ast;
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if ( auto initializer_context = decl->variableDeclarationInitializer() )
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{
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if ( initializer_context->ARRAY() )
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{
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var_ast = std::make_unique<VarStatement>( loc, std::move( name ), true );
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}
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else
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{
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auto initializer = variable_initializer( initializer_context );
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var_ast =
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std::make_unique<VarStatement>( loc, std::move( name ), std::move( initializer ) );
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}
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}
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else
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{
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var_ast = std::make_unique<VarStatement>( loc, std::move( name ) );
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}
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auto consumed = consume_statement_result( std::move( var_ast ) );
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statements.push_back( std::move( consumed ) );
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}
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}
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}
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std::unique_ptr<Statement> SimpleStatementBuilder::consume_statement_result(
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std::unique_ptr<Statement> statement )
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{
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return std::make_unique<ValueConsumer>( statement->source_location, std::move( statement ) );
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}
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std::unique_ptr<Expression> SimpleStatementBuilder::variable_initializer(
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EscriptParser::VariableDeclarationInitializerContext* ctx )
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{
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if ( auto expr = ctx->expression() )
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return expression( expr );
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else
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return std::unique_ptr<Expression>( new StringValue( location_for( *ctx ), "" ) );
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}
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} // namespace Pol::Bscript::Compiler
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