sema

Documentation

Overview

Package sema performs semantic checking of OpenGL ES Shading Language programs.

Index

• func Analyze(program interface{}, evaluator Evaluator) (err []error)
• type Evaluator

Functions

func Analyze

func Analyze(program interface{}, evaluator Evaluator) (err []error)

Analyze is the main entry point of the package. It performs a semantic check of a GLES Shading Language program. Its arguments are the AST representation of the program, and a constant expression evaluating function. This function is used for evaluating array size expressions and the values of constant variables. An implementation of such a function can be found in the evaluator package.

The Analyze function is a work in progress. Currently it just computes the types of all the expressions and evaluates all constant expressions.

Types

type Evaluator

type Evaluator func(expr ast.Expression, resolver func(symbol ast.ValueSymbol) ast.Value, lang ast.Language) (val ast.Value, err []error)

Evaluator is the type of the function used for evaluating constant expressions.