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add eval functions for evaluating constants
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‎ast.h‎

Lines changed: 46 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -278,6 +278,8 @@ class Expression: public AstNode {
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public:
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Expression(const Type *type, bool is_constant): type(type), is_constant(is_constant) {}
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virtual Number eval_number() const = 0;
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virtual std::string eval_string() const = 0;
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virtual const VariableReference *get_reference() const { return nullptr; }
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virtual void generate(Emitter &emitter) const = 0;
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@@ -306,6 +308,8 @@ class ConstantBooleanExpression: public Expression {
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const bool value;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const;
@@ -317,6 +321,8 @@ class ConstantNumberExpression: public Expression {
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const Number value;
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virtual Number eval_number() const { return value; }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const;
@@ -328,6 +334,8 @@ class ConstantStringExpression: public Expression {
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const std::string value;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { return value; }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const;
@@ -339,6 +347,8 @@ class ConstantEnumExpression: public Expression {
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const int value;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const;
@@ -352,6 +362,8 @@ class UnaryMinusExpression: public Expression {
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const Expression *const value;
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virtual Number eval_number() const { return number_negate(value->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -370,6 +382,8 @@ class LogicalNotExpression: public Expression {
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const Expression *const value;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -390,6 +404,8 @@ class ConditionalExpression: public Expression {
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const Expression *left;
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const Expression *right;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -410,6 +426,8 @@ class DisjunctionExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -430,6 +448,8 @@ class ConjunctionExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -459,6 +479,8 @@ class BooleanComparisonExpression: public ComparisonExpression {
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public:
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BooleanComparisonExpression(const Expression *left, const Expression *right, Comparison comp): ComparisonExpression(left, right, comp) {}
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -470,6 +492,8 @@ class NumericComparisonExpression: public ComparisonExpression {
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public:
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NumericComparisonExpression(const Expression *left, const Expression *right, Comparison comp): ComparisonExpression(left, right, comp) {}
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -481,6 +505,8 @@ class StringComparisonExpression: public ComparisonExpression {
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public:
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StringComparisonExpression(const Expression *left, const Expression *right, Comparison comp): ComparisonExpression(left, right, comp) {}
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -492,6 +518,8 @@ class ArrayComparisonExpression: public ComparisonExpression {
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public:
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ArrayComparisonExpression(const Expression *left, const Expression *right, Comparison comp): ComparisonExpression(left, right, comp) {}
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -503,6 +531,8 @@ class DictionaryComparisonExpression: public ComparisonExpression {
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public:
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DictionaryComparisonExpression(const Expression *left, const Expression *right, Comparison comp): ComparisonExpression(left, right, comp) {}
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -520,6 +550,8 @@ class AdditionExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_add(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -540,6 +572,8 @@ class SubtractionExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_subtract(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -560,6 +594,8 @@ class MultiplicationExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_multiply(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -580,6 +616,8 @@ class DivisionExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_divide(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -600,6 +638,8 @@ class ModuloExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_modulo(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -620,6 +660,8 @@ class ExponentiationExpression: public Expression {
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const Expression *const left;
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const Expression *const right;
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virtual Number eval_number() const { return number_pow(left->eval_number(), right->eval_number()); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const {
@@ -738,6 +780,8 @@ class VariableExpression: public Expression {
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const VariableReference *var;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual const VariableReference *get_reference() const { return var; }
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virtual void generate(Emitter &emitter) const;
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@@ -756,6 +800,8 @@ class FunctionCall: public Expression {
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const VariableReference *const func;
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const std::vector<const Expression *> args;
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virtual Number eval_number() const { assert(false); }
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virtual std::string eval_string() const { assert(false); }
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virtual void generate(Emitter &emitter) const;
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virtual std::string text() const;

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