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137 lines
3.4 KiB
C++
137 lines
3.4 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_AST_EXPRESSION_H_
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#define EXECUTABLE_SEMANTICS_AST_EXPRESSION_H_
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#include <string>
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#include <vector>
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namespace Carbon {
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struct Expression;
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// A FieldInitializer represents the initialization of a single tuple field.
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struct FieldInitializer {
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// The field name. For a positional field, this may be empty.
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std::string name;
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// The expression that initializes the field.
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const Expression* expression;
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};
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enum class ExpressionKind {
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AutoT,
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BoolT,
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Boolean,
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Call,
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FunctionT,
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GetField,
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Index,
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IntT,
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ContinuationT, // The type of a continuation value.
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Integer,
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PatternVariable,
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PrimitiveOp,
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Tuple,
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TypeT,
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Variable,
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};
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enum class Operator {
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Add,
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And,
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Eq,
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Neg,
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Not,
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Or,
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Sub,
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};
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struct Expression {
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int line_num;
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ExpressionKind tag;
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union {
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struct {
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std::string* name;
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} variable;
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struct {
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const Expression* aggregate;
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std::string* field;
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} get_field;
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struct {
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const Expression* aggregate;
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const Expression* offset;
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} index;
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struct {
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std::string* name;
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const Expression* type;
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} pattern_variable;
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int integer;
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bool boolean;
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struct {
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std::vector<FieldInitializer>* fields;
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} tuple;
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struct {
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Operator op;
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std::vector<const Expression*>* arguments;
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} primitive_op;
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struct {
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const Expression* function;
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const Expression* argument;
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} call;
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struct {
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const Expression* parameter;
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const Expression* return_type;
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} function_type;
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} u;
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};
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auto MakeVar(int line_num, std::string var) -> const Expression*;
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auto MakeVarPat(int line_num, std::string var, const Expression* type)
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-> const Expression*;
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auto MakeInt(int line_num, int i) -> const Expression*;
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auto MakeBool(int line_num, bool b) -> const Expression*;
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auto MakeOp(int line_num, Operator op, std::vector<const Expression*>* args)
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-> const Expression*;
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auto MakeUnOp(int line_num, enum Operator op, const Expression* arg)
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-> const Expression*;
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auto MakeBinOp(int line_num, enum Operator op, const Expression* arg1,
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const Expression* arg2) -> const Expression*;
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auto MakeCall(int line_num, const Expression* fun, const Expression* arg)
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-> const Expression*;
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auto MakeGetField(int line_num, const Expression* exp, std::string field)
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-> const Expression*;
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auto MakeTuple(int line_num, std::vector<FieldInitializer>* args)
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-> const Expression*;
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// Create an AST node for an empty tuple.
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auto MakeUnit(int line_num) -> const Expression*;
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auto MakeIndex(int line_num, const Expression* exp, const Expression* i)
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-> const Expression*;
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auto MakeTypeType(int line_num) -> const Expression*;
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auto MakeIntType(int line_num) -> const Expression*;
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auto MakeBoolType(int line_num) -> const Expression*;
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auto MakeFunType(int line_num, const Expression* param, const Expression* ret)
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-> const Expression*;
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auto MakeAutoType(int line_num) -> const Expression*;
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// Returns a Continuation type AST node at the given source location,
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// which is the type of a continuation value.
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auto MakeContinuationType(int line_num) -> const Expression*;
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void PrintExp(const Expression* exp);
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_AST_EXPRESSION_H_
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