compiler: generalize mod dag & use for sorting structs also
joe-conigliaro
Alexander Medvednikov
parent
db110759ab
commit
b4d033ff54
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@ -360,24 +360,39 @@ fn types_to_c(types []Type, table &Table) string {
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return sb.str()
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}
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// pretty inefficient algo, works fine with N < 1000 (TODO optimize)
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// sort structs by dependant fields
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fn sort_structs(types mut []Type) {
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mut cnt := 0
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mut graph := new_dep_graph()
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// types list
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mut type_names := []string
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for i := 0; i < types.len; i++ {
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for j in 0 .. i {
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t := types[i]
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//t2 := types[j]
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// check if any of the types before `t` reference `t`
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if types[j].contains_field_type(t.name) {
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//println('moving up: $t.name len=$types.len')
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types.insert(j, t)
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types.delete(i+1)
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i = 0 // Start from scratch
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cnt++
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if cnt > 500 {
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println('infinite type loop (perhaps you have a recursive struct `$t.name`?)')
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exit(1)
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}
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type_names << types[i].name
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}
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// loop over types
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for i := 0; i < types.len; i++ {
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t := types[i]
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// create list of deps
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mut field_types := []string
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for field in t.fields {
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// skip if not in types list
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if !(field.typ in type_names) {
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continue
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}
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field_types << field.typ
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}
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// add type and dependant types to graph
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graph.add(t.name, field_types)
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}
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// sort
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sorted := graph.resolve()
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// reorder types
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old_types := types.clone()
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for i:=0; i<sorted.nodes.len; i++ {
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node := sorted.nodes[i]
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for j := 0; j < old_types.len; j++ {
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t := old_types[j]
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if t.name == node.name {
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types[i] = t
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continue
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}
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}
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@ -0,0 +1,130 @@
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// Copyright (c) 2019 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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// Directed acyclic graph
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// this implementation is specifically suited to ordering dependencies
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module main
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struct DepGraphNode {
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mut:
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name string
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deps []string
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last_cycle string
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}
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struct DepGraph {
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pub:
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mut:
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acyclic bool
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nodes []DepGraphNode
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}
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struct DepSet {
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mut:
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items []string
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}
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pub fn(dset mut DepSet) add(item string) {
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dset.items << item
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}
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pub fn(dset &DepSet) diff(otherset DepSet) DepSet {
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mut diff := DepSet{}
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for item in dset.items {
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if !item in otherset.items {
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diff.items << item
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}
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}
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return diff
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}
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pub fn(dset &DepSet) size() int {
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return dset.items.len
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}
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pub fn new_dep_graph() &DepGraph {
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return &DepGraph{
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acyclic: true
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}
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}
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pub fn(graph mut DepGraph) add(mod string, deps []string) {
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graph.nodes << DepGraphNode{
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name: mod,
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deps: deps
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}
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}
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pub fn(graph &DepGraph) resolve() &DepGraph {
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mut node_names := map[string]DepGraphNode
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mut node_deps := map[string]DepSet
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for _, node in graph.nodes {
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node_names[node.name] = node
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mut dep_set := DepSet{}
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for _, dep in node.deps {
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dep_set.add(dep)
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}
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node_deps[node.name] = dep_set
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}
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mut resolved := new_dep_graph()
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for node_deps.size != 0 {
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mut ready_set := DepSet{}
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for name, deps in node_deps {
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if deps.size() == 0 {
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ready_set.add(name)
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}
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}
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if ready_set.size() == 0 {
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mut g := new_dep_graph()
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g.acyclic = false
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ndk := node_deps.keys()
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for name, _ in node_deps {
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mut node := node_names[name]
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if name == ndk[node_deps.size-1] {
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node.last_cycle = node_deps[name].items[node_deps[name].items.len-1]
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}
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g.nodes << node
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}
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return g
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}
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for name in ready_set.items {
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node_deps.delete(name)
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resolved.nodes << node_names[name]
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}
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for name, deps in node_deps {
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node_deps[name] = deps.diff(ready_set)
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}
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}
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return resolved
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}
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pub fn(graph &DepGraph) last_node() DepGraphNode {
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return graph.nodes[graph.nodes.len-1]
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}
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pub fn(graph &DepGraph) last_cycle() string {
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return graph.last_node().last_cycle
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}
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pub fn(graph &DepGraph) display() {
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for i:=0; i<graph.nodes.len; i++ {
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node := graph.nodes[i]
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for dep in node.deps {
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mut out := ' * $node.name -> $dep'
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if !graph.acyclic && i == graph.nodes.len-1 && dep == node.last_cycle {
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out += ' <-- last cycle'
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}
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println(out)
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}
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}
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}
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@ -577,7 +577,7 @@ fn (v mut V) add_v_files_to_compile() {
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println(v.table.imports)
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}
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// graph deps
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mut dep_graph := new_mod_dep_graph()
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mut dep_graph := new_dep_graph()
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dep_graph.from_import_tables(v.table.file_imports)
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deps_resolved := dep_graph.resolve()
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if !deps_resolved.acyclic {
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@ -6,50 +6,8 @@ module main
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import os
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struct ModDepGraphNode {
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mut:
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name string
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deps []string
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last_cycle string
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}
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struct ModDepGraph {
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pub:
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mut:
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acyclic bool
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nodes []ModDepGraphNode
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}
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struct DepSet {
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mut:
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items []string
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}
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pub fn(dset mut DepSet) add(item string) {
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dset.items << item
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}
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pub fn(dset &DepSet) diff(otherset DepSet) DepSet {
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mut diff := DepSet{}
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for item in dset.items {
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if !item in otherset.items {
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diff.items << item
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}
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}
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return diff
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}
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pub fn(dset &DepSet) size() int {
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return dset.items.len
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}
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pub fn new_mod_dep_graph() &ModDepGraph {
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return &ModDepGraph{
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acyclic: true
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}
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}
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pub fn(graph mut ModDepGraph) from_import_tables(import_tables []FileImportTable) {
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// add a module and its deps (module speficic dag method)
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pub fn(graph mut DepGraph) from_import_tables(import_tables []FileImportTable) {
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for fit in import_tables {
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mut deps := []string
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for _, m in fit.imports {
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@ -59,64 +17,8 @@ pub fn(graph mut ModDepGraph) from_import_tables(import_tables []FileImportTable
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}
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}
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pub fn(graph mut ModDepGraph) add(mod string, deps []string) {
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graph.nodes << ModDepGraphNode{
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name: mod,
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deps: deps
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}
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}
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pub fn(graph &ModDepGraph) resolve() &ModDepGraph {
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mut node_names := map[string]ModDepGraphNode
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mut node_deps := map[string]DepSet
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for _, node in graph.nodes {
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node_names[node.name] = node
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mut dep_set := DepSet{}
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for _, dep in node.deps {
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dep_set.add(dep)
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}
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node_deps[node.name] = dep_set
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}
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mut resolved := new_mod_dep_graph()
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for node_deps.size != 0 {
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mut ready_set := DepSet{}
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for name, deps in node_deps {
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if deps.size() == 0 {
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ready_set.add(name)
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}
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}
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if ready_set.size() == 0 {
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mut g := new_mod_dep_graph()
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g.acyclic = false
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ndk := node_deps.keys()
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for name, _ in node_deps {
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mut node := node_names[name]
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if name == ndk[node_deps.size-1] {
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node.last_cycle = node_deps[name].items[node_deps[name].items.len-1]
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}
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g.nodes << node
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}
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return g
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}
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for name in ready_set.items {
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node_deps.delete(name)
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resolved.nodes << node_names[name]
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}
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for name, deps in node_deps {
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node_deps[name] = deps.diff(ready_set)
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}
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}
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return resolved
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}
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pub fn(graph &ModDepGraph) imports() []string {
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// get ordered imports (module speficic dag method)
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pub fn(graph &DepGraph) imports() []string {
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mut mods := []string
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for node in graph.nodes {
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if node.name == 'main' {
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@ -127,27 +29,6 @@ pub fn(graph &ModDepGraph) imports() []string {
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return mods
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}
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pub fn(graph &ModDepGraph) last_node() ModDepGraphNode {
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return graph.nodes[graph.nodes.len-1]
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}
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pub fn(graph &ModDepGraph) last_cycle() string {
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return graph.last_node().last_cycle
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}
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pub fn(graph &ModDepGraph) display() {
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for i:=0; i<graph.nodes.len; i++ {
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node := graph.nodes[i]
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for dep in node.deps {
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mut out := ' * $node.name -> $dep'
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if !graph.acyclic && i == graph.nodes.len-1 && dep == node.last_cycle {
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out += ' <-- last cycle'
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}
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println(out)
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}
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}
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}
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// 'strings' => 'VROOT/vlib/strings'
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// 'installed_mod' => '~/.vmodules/installed_mod'
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// 'local_mod' => '/path/to/current/dir/local_mod'
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@ -1,41 +1,40 @@
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// Skip this test until struct field order bug is fixed
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// import encoding.csv
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import encoding.csv
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// fn test_encoding_csv_reader() {
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// data := 'name,email,phone,other\njoe,joe@blow.com,0400000000,test\nsam,sam@likesham.com,0433000000,"test quoted field"\n#chris,chris@nomail.com,94444444,"commented row"\nmike,mike@mikesbikes.com,98888888,"bike store"\n'
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// mut csv_reader := csv.new_reader(data)
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fn test_encoding_csv_reader() {
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data := 'name,email,phone,other\njoe,joe@blow.com,0400000000,test\nsam,sam@likesham.com,0433000000,"test quoted field"\n#chris,chris@nomail.com,94444444,"commented row"\nmike,mike@mikesbikes.com,98888888,"bike store"\n'
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mut csv_reader := csv.new_reader(data)
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// mut row_count := 0
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// for {
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// row := csv_reader.read() or {
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// break
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// }
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// row_count++
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// if row_count== 1 {
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// assert row[0] == 'name'
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// }
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// if row_count == 2 {
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// assert row[0] == 'joe'
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// }
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// if row_count == 3 {
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// assert row[0] == 'sam'
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// // quoted field
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// assert row[3] == 'test quoted field'
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// }
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// if row_count == 4 {
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// assert row[0] == 'mike'
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// }
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// }
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mut row_count := 0
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for {
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row := csv_reader.read() or {
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break
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}
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row_count++
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if row_count== 1 {
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assert row[0] == 'name'
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}
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if row_count == 2 {
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assert row[0] == 'joe'
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}
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if row_count == 3 {
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assert row[0] == 'sam'
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// quoted field
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assert row[3] == 'test quoted field'
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}
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if row_count == 4 {
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assert row[0] == 'mike'
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}
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}
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// assert row_count == 4
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// }
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assert row_count == 4
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}
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// fn test_encoding_csv_writer() {
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// mut csv_writer := csv.new_writer()
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fn test_encoding_csv_writer() {
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mut csv_writer := csv.new_writer()
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// csv_writer.write(['name', 'email', 'phone', 'other'])
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// csv_writer.write(['joe', 'joe@blow.com', '0400000000', 'test'])
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// csv_writer.write(['sam', 'sam@likesham.com', '0433000000', 'needs, quoting'])
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csv_writer.write(['name', 'email', 'phone', 'other'])
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csv_writer.write(['joe', 'joe@blow.com', '0400000000', 'test'])
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csv_writer.write(['sam', 'sam@likesham.com', '0433000000', 'needs, quoting'])
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// assert csv_writer.str() == 'name,email,phone,other\njoe,joe@blow.com,0400000000,test\nsam,sam@likesham.com,0433000000,"needs, quoting"\n'
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// }
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assert csv_writer.str() == 'name,email,phone,other\njoe,joe@blow.com,0400000000,test\nsam,sam@likesham.com,0433000000,"needs, quoting"\n'
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}
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