094d3a0817
This change includes some progress on actual compilation (albeit with several TODOs remaining before we can actually spit out a useful artifact). There are also some general cleanups sprinkled throughout. In a nutshell: * Add a compiler.Context object that will be available during template expansion. * Introduce a diag.Document abstraction. This is better than passing raw filenames around, and lets us embellish diagnostics as we go. In particular, we will be in a better position to provide line/column error information. * Move IO out of the Parser and into the Compiler, where it can cache and reuse Documents. This will become important as we start to load up dependencies. * Rename PosRange to Location. This reads nicer with the new Document terminology. * Rename the mu/api package to mu/schema. It's likely we will need to introduce a true AST that is decoupled from the serialization format and contains bound nodes. As a result, treating the existing types as "schema" is more honest. * Add in a big section of TODOs at the end of the compiler.Compiler.Build function.
36 lines
765 B
Go
36 lines
765 B
Go
// Copyright 2016 Marapongo, Inc. All rights reserved.
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package diag
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import (
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"io/ioutil"
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"path/filepath"
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)
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// Document is a file used during compilation, for which advanced diagnostics, such as line/column numbers, may be
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// required. It stores the contents of the entire file so that precise errors can be given; Forget discards them.
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type Document struct {
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File string
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Body []byte
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}
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func NewDocument(file string) *Document {
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return &Document{File: file}
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}
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func ReadDocument(file string) (*Document, error) {
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body, err := ioutil.ReadFile(file)
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if err != nil {
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return nil, err
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}
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return &Document{File: file, Body: body}, nil
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}
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func (doc *Document) Ext() string {
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return filepath.Ext(doc.File)
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}
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func (doc *Document) Forget() {
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doc.Body = nil
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}
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