diff options
Diffstat (limited to 'dhall_syntax')
| -rw-r--r-- | dhall_syntax/.gitignore | 1 | ||||
| -rw-r--r-- | dhall_syntax/Cargo.toml | 4 | ||||
| -rw-r--r-- | dhall_syntax/build.rs | 90 | ||||
| l--------- | dhall_syntax/src/dhall.abnf | 1 | ||||
| -rw-r--r-- | dhall_syntax/src/dhall.pest.visibility | 182 | ||||
| -rw-r--r-- | dhall_syntax/src/parser.rs | 2 |
6 files changed, 279 insertions, 1 deletions
diff --git a/dhall_syntax/.gitignore b/dhall_syntax/.gitignore new file mode 100644 index 0000000..8a0bac6 --- /dev/null +++ b/dhall_syntax/.gitignore @@ -0,0 +1 @@ +src/dhall.pest diff --git a/dhall_syntax/Cargo.toml b/dhall_syntax/Cargo.toml index d732bff..7708954 100644 --- a/dhall_syntax/Cargo.toml +++ b/dhall_syntax/Cargo.toml @@ -4,10 +4,14 @@ version = "0.1.0" authors = ["NanoTech <nanotech@nanotechcorp.net>", "Nadrieril <nadrieril@users.noreply.github.com>"] license = "BSD-2-Clause" edition = "2018" +build = "build.rs" [lib] doctest = false +[build-dependencies] +abnf_to_pest = { version = "0.1.1", path = "../abnf_to_pest" } + [dependencies] itertools = "0.8.0" percent-encoding = "2.1.0" diff --git a/dhall_syntax/build.rs b/dhall_syntax/build.rs new file mode 100644 index 0000000..d846f92 --- /dev/null +++ b/dhall_syntax/build.rs @@ -0,0 +1,90 @@ +use std::fs::File; +use std::io::{BufRead, BufReader, Read, Write}; + +use abnf_to_pest::render_rules_to_pest; + +fn main() -> std::io::Result<()> { + let abnf_path = "src/dhall.abnf"; + let visibility_path = "src/dhall.pest.visibility"; + let pest_path = "src/dhall.pest"; + println!("cargo:rerun-if-changed={}", abnf_path); + println!("cargo:rerun-if-changed={}", visibility_path); + + let mut file = File::open(abnf_path)?; + let mut data = Vec::new(); + file.read_to_end(&mut data)?; + data.push('\n' as u8); + + let mut rules = abnf_to_pest::parse_abnf(&data)?; + for line in BufReader::new(File::open(visibility_path)?).lines() { + let line = line?; + if line.len() >= 2 && &line[0..2] == "# " { + rules.get_mut(&line[2..]).map(|x| x.silent = true); + } + } + + let mut file = File::create(pest_path)?; + writeln!(&mut file, "// AUTO-GENERATED FILE. See build.rs.")?; + + // TODO: this is a cheat; properly support RFC3986 URLs instead + rules.remove("url_path"); + writeln!(&mut file, "url_path = _{{ path }}")?; + + rules.remove("simple_label"); + writeln!( + &mut file, + "simple_label = {{ + keyword ~ simple_label_next_char+ + | !keyword ~ simple_label_first_char ~ simple_label_next_char* + }}" + )?; + + rules.remove("nonreserved_label"); + writeln!( + &mut file, + "nonreserved_label = _{{ + !(builtin ~ !simple_label_next_char) ~ label + }}" + )?; + + // Setup grammar for precedence climbing + rules.remove("operator_expression"); + writeln!(&mut file, r##" + import_alt = {{ "?" ~ whsp1 }} + bool_or = {{ "||" }} + natural_plus = {{ "+" ~ whsp1 }} + text_append = {{ "++" }} + list_append = {{ "#" }} + bool_and = {{ "&&" }} + natural_times = {{ "*" }} + bool_eq = {{ "==" }} + bool_ne = {{ "!=" }} + + operator = _{{ + equivalent | + bool_ne | + bool_eq | + natural_times | + combine_types | + prefer | + combine | + bool_and | + list_append | + text_append | + natural_plus | + bool_or | + import_alt + }} + operator_expression = {{ application_expression ~ (whsp ~ operator ~ whsp ~ application_expression)* }} + "##)?; + + writeln!( + &mut file, + "final_expression = ${{ SOI ~ complete_expression ~ EOI }}" + )?; + + writeln!(&mut file)?; + writeln!(&mut file, "{}", render_rules_to_pest(rules).pretty(80))?; + + Ok(()) +} diff --git a/dhall_syntax/src/dhall.abnf b/dhall_syntax/src/dhall.abnf new file mode 120000 index 0000000..ce13b8e --- /dev/null +++ b/dhall_syntax/src/dhall.abnf @@ -0,0 +1 @@ +../../dhall-lang/standard/dhall.abnf
\ No newline at end of file diff --git a/dhall_syntax/src/dhall.pest.visibility b/dhall_syntax/src/dhall.pest.visibility new file mode 100644 index 0000000..17c1edc --- /dev/null +++ b/dhall_syntax/src/dhall.pest.visibility @@ -0,0 +1,182 @@ +# end_of_line +# valid_non_ascii +# tab +# block_comment +# block_comment_char +# block_comment_continue +# not_end_of_line +# line_comment +# whitespace_chunk +# whsp +# whsp1 +# ALPHA +# DIGIT +# ALPHANUM +# HEXDIG +# simple_label_first_char +# simple_label_next_char +simple_label +# quoted_label_char +quoted_label +# label +# nonreserved_label +# any_label +double_quote_chunk +double_quote_escaped +# unicode_escape +double_quote_char +double_quote_literal +single_quote_continue +escaped_quote_pair +escaped_interpolation +single_quote_char +single_quote_literal +# interpolation +# text_literal +if_ +# then +# else_ +# let_ +# in_ +# as_ +# using +merge +missing +# Infinity +NaN +Some_ +toMap +assert +# keyword +builtin +# Optional +Text +# List +Location +# Bool +# True +# False +# None_ +# Natural +# Integer +# Double +# Type +# Kind +# Sort +# Natural_fold +# Natural_build +# Natural_isZero +# Natural_even +# Natural_odd +# Natural_toInteger +# Natural_show +# Integer_toDouble +# Integer_show +# Natural_subtract +# Double_show +# List_build +# List_fold +# List_length +# List_head +# List_last +# List_indexed +# List_reverse +# Optional_fold +# Optional_build +# Text_show +combine +combine_types +equivalent +prefer +lambda +forall +arrow +# exponent +numeric_double_literal +minus_infinity_literal +plus_infinity_literal +# double_literal +natural_literal +integer_literal +identifier +variable +# path_character +# quoted_path_character +unquoted_path_component +quoted_path_component +# path_component +path +local +parent_path +here_path +home_path +absolute_path +scheme +http_raw +authority +# userinfo +# host +# port +# IP_literal +# IPvFuture +# IPv6address +# h16 +# ls32 +# IPv4address +# dec_octet +# domain +# domainlabel +# pchar +query +# pct_encoded +# unreserved +# sub_delims +http +env +bash_environment_variable +posix_environment_variable +posix_environment_variable_character +# import_type +hash +import_hashed +import +expression +# annotated_expression +let_binding +empty_list_literal +operator_expression +import_alt_expression +or_expression +plus_expression +text_append_expression +list_append_expression +and_expression +combine_expression +prefer_expression +combine_types_expression +times_expression +equal_expression +not_equal_expression +equivalent_expression +application_expression +first_application_expression +# import_expression +selector_expression +selector +labels +# type_selector +primitive_expression +# record_type_or_literal +empty_record_literal +empty_record_type +non_empty_record_type_or_literal +non_empty_record_type +record_type_entry +non_empty_record_literal +record_literal_entry +union_type +empty_union_type +# non_empty_union_type +union_type_entry +non_empty_list_literal +# complete_expression diff --git a/dhall_syntax/src/parser.rs b/dhall_syntax/src/parser.rs index 3ea766f..044d3f1 100644 --- a/dhall_syntax/src/parser.rs +++ b/dhall_syntax/src/parser.rs @@ -146,7 +146,7 @@ lazy_static::lazy_static! { } #[derive(Parser)] -#[grammar = "../../dhall_generated_parser/src/dhall.pest"] +#[grammar = "dhall.pest"] struct DhallParser; #[pest_consume::parser(parser = DhallParser, rule = Rule)] |