tijani
886a16e706
Interpreter can now evaluate Booleans git-svn-id: https://svn.tlawal.org/svn/monkey@45 f6afcba9-9ef1-4bdd-9b72-7484f5705bac
36 lines
628 B
Go
36 lines
628 B
Go
package evaluator
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import (
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"monkey/ast"
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"monkey/object"
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)
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func Eval(node ast.Node) object.Object {
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switch node := node.(type) {
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// Statements
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case *ast.Program:
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return eval_statements(node.Statements)
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case *ast.ExpressionStatement:
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return Eval(node.Expression)
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// Expressions
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case *ast.IntegerLiteral:
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return &object.Integer{Value: node.Value}
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case *ast.Boolean:
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return &object.Boolean{Value: node.Value}
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}
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return nil
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}
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func eval_statements(statements []ast.Statement) object.Object {
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var result object.Object
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for _, statement := range statements {
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result = Eval(statement)
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}
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return result
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}
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