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use rand::random;
use std::collections::HashMap;
use source::Src;
use var::Var;
#[derive(Debug,PartialEq)]
pub struct SrcBlock {
pub name: String,
pub src: Vec<Src>
}
#[derive(Debug,PartialEq)]
pub struct DefBlock {
pub name: String,
pub defs: Vec<(String,Var)>
}
#[derive(Debug,PartialEq)]
pub enum Block {
Src(SrcBlock),
Def(DefBlock),
}
pub struct Parser(Vec<Block>);
use std::ops::Deref;
impl Deref for Parser {
type Target = Vec<Block>;
fn deref(&self) -> &Self::Target { &self.0 }
}
impl Parser {
pub fn parse_blocks (src: &str) -> Parser {
let mut v = vec!();
let mut exp = String::new();
let mut exps: Vec<String> = vec!();
let mut block: Option<Block> = None;
let mut in_string = false;
let mut in_comment = false;
let mut in_vec = false;
for c in src.chars() {
if c == '[' { in_vec = true; continue }
else if c == ']' { in_vec = false; }
else if c == '#' && !in_string { in_comment = true; }
else if c == '\n' && in_comment && !in_string {
in_comment = false;
continue;
}
if c == '\n' && in_vec { continue }
if (c == ']' ||
c == '#' ||
c == '\n')
&& !in_string
{
for n in exp.split_whitespace() {
exps.push(n.trim().to_owned());
}
exp = String::new();
if exps.len() < 1 { continue }
if block.is_none() {
let name = exps.pop().unwrap();
if name == "def" {
let b = DefBlock {
name: exps.pop().unwrap(),
defs: vec!()
};
block = Some(Block::Def(b));
}
else {
let b = SrcBlock {
name: name,
src: vec!()
};
block = Some(Block::Src(b));
}
}
else {
let mut qsyms = vec!();
for n in exps.iter_mut() {
if n.chars().next().expect("ERROR: Empty QSYM") == '\'' {
let mut qsym = "__".to_owned();
let sym = n[1..].trim().to_owned();
qsym.push_str(&random::<u16>().to_string());
qsyms.push(qsym.clone());
qsyms.push(sym);
*n = qsym;
}
}
match block {
Some(Block::Def(ref mut b)) => {
b.defs.push((exps[0].to_owned(),
Var::parse(exps[1].to_owned())));
},
Some(Block::Src(ref mut b)) => {
if qsyms.len() > 1 {
b.src.push(Src::parse(qsyms));
}
b.src.push(Src::parse(exps));
},
_ => {}
}
exps = vec!();
}
}
else if c == '"' && !in_comment {
in_string = !in_string;
if in_string {
for n in exp.split_whitespace() {
exps.push(n.trim().to_owned());
}
exp = String::new();
}
else if !in_string {
exps.push(exp);
exp = String::new();
}
}
else if c == ';' && !in_string && !in_comment {
v.push(block.unwrap());
block = None;
}
else {
if !in_comment {
exp.push(c);
}
}
}
Parser(v)
}
pub fn into_env (mut self) -> Env {
let mut src = HashMap::new();
let mut def = HashMap::new();
for b in self.0.drain(..) {
match b {
Block::Def(db) => {
def.insert(db.name.clone(), db);
},
Block::Src(sb) => {
src.insert(sb.name.clone(), sb);
},
}
}
Env { def: def, src: src }
}
}
pub struct Env {
pub def: HashMap<String, DefBlock>,
pub src: HashMap<String, SrcBlock>
}