Syntax_Tools

Reference Manual

Version 2.1.4

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### Table of Contents

- epp_dodger
  - Top of manual page
  - parse/1
  - parse/2
  - parse/3
  - parse_file/1
  - parse_file/2
  - parse_form/2
  - parse_form/3
  - quick_parse/1
  - quick_parse/2
  - quick_parse/3
  - quick_parse_file/1
  - quick_parse_file/2
  - quick_parse_form/2
  - quick_parse_form/3
  - tokens_to_string/1
- erl_comment_scan
  - Top of manual page
  - file/1
  - join_lines/1
  - scan_lines/1
  - string/1
- erl_prettypr
  - Top of manual page
  - best/1
  - best/2
  - format/1
  - format/2
  - get_ctxt_hook/1
  - get_ctxt_linewidth/1
  - get_ctxt_paperwidth/1
  - get_ctxt_precedence/1
  - get_ctxt_user/1
  - layout/1
  - layout/2
  - set_ctxt_hook/2
  - set_ctxt_linewidth/2
  - set_ctxt_paperwidth/2
  - set_ctxt_precedence/2
  - set_ctxt_user/2
- erl_recomment
  - Top of manual page
  - quick_recomment_forms/2
  - recomment_forms/2
  - recomment_tree/2
- erl_syntax
  - Top of manual page
  - abstract/1
  - add_ann/2
  - add_postcomments/2
  - add_precomments/2
  - annotated_type/2
  - annotated_type_body/1
  - annotated_type_name/1
  - application/2
  - application/3
  - application_arguments/1
  - application_operator/1
  - arity_qualifier/2
  - arity_qualifier_argument/1
  - arity_qualifier_body/1
  - atom/1
  - atom_literal/1
  - atom_literal/2
  - atom_name/1
  - atom_value/1
  - attribute/1
  - attribute/2
  - attribute_arguments/1
  - attribute_name/1
  - binary/1
  - binary_comp/2
  - binary_comp_body/1
  - binary_comp_template/1
  - binary_field/1
  - binary_field/2
  - binary_field/3
  - binary_field_body/1
  - binary_field_size/1
  - binary_field_types/1
  - binary_fields/1
  - binary_generator/2
  - binary_generator_body/1
  - binary_generator_pattern/1
  - bitstring_type/2
  - bitstring_type_m/1
  - bitstring_type_n/1
  - block_expr/1
  - block_expr_body/1
  - case_expr/2
  - case_expr_argument/1
  - case_expr_clauses/1
  - catch_expr/1
  - catch_expr_body/1
  - char/1
  - char_literal/1
  - char_literal/2
  - char_value/1
  - class_qualifier/2
  - class_qualifier_argument/1
  - class_qualifier_body/1
  - clause/2
  - clause/3
  - clause_body/1
  - clause_guard/1
  - clause_patterns/1
  - comment/1
  - comment/2
  - comment_padding/1
  - comment_text/1
  - compact_list/1
  - concrete/1
  - cond_expr/1
  - cond_expr_clauses/1
  - conjunction/1
  - conjunction_body/1
  - cons/2
  - constrained_function_type/2
  - constrained_function_type_argument/1
  - constrained_function_type_body/1
  - constraint/2
  - constraint_argument/1
  - constraint_body/1
  - copy_ann/2
  - copy_attrs/2
  - copy_comments/2
  - copy_pos/2
  - data/1
  - disjunction/1
  - disjunction_body/1
  - eof_marker/0
  - error_marker/1
  - error_marker_info/1
  - flatten_form_list/1
  - float/1
  - float_literal/1
  - float_value/1
  - form_list/1
  - form_list_elements/1
  - fun_expr/1
  - fun_expr_arity/1
  - fun_expr_clauses/1
  - fun_type/0
  - function/2
  - function_arity/1
  - function_clauses/1
  - function_name/1
  - function_type/1
  - function_type/2
  - function_type_arguments/1
  - function_type_return/1
  - generator/2
  - generator_body/1
  - generator_pattern/1
  - get_ann/1
  - get_attrs/1
  - get_pos/1
  - get_postcomments/1
  - get_precomments/1
  - has_comments/1
  - if_expr/1
  - if_expr_clauses/1
  - implicit_fun/1
  - implicit_fun/2
  - implicit_fun/3
  - implicit_fun_name/1
  - infix_expr/3
  - infix_expr_left/1
  - infix_expr_operator/1
  - infix_expr_right/1
  - integer/1
  - integer_literal/1
  - integer_range_type/2
  - integer_range_type_high/1
  - integer_range_type_low/1
  - integer_value/1
  - is_atom/2
  - is_char/2
  - is_form/1
  - is_integer/2
  - is_leaf/1
  - is_list_skeleton/1
  - is_literal/1
  - is_proper_list/1
  - is_string/2
  - is_tree/1
  - join_comments/2
  - list/1
  - list/2
  - list_comp/2
  - list_comp_body/1
  - list_comp_template/1
  - list_elements/1
  - list_head/1
  - list_length/1
  - list_prefix/1
  - list_suffix/1
  - list_tail/1
  - macro/1
  - macro/2
  - macro_arguments/1
  - macro_name/1
  - make_tree/2
  - map_expr/1
  - map_expr/2
  - map_expr_argument/1
  - map_expr_fields/1
  - map_field_assoc/2
  - map_field_assoc_name/1
  - map_field_assoc_value/1
  - map_field_exact/2
  - map_field_exact_name/1
  - map_field_exact_value/1
  - map_type/0
  - map_type/1
  - map_type_assoc/2
  - map_type_assoc_name/1
  - map_type_assoc_value/1
  - map_type_exact/2
  - map_type_exact_name/1
  - map_type_exact_value/1
  - map_type_fields/1
  - match_expr/2
  - match_expr_body/1
  - match_expr_pattern/1
  - meta/1
  - module_qualifier/2
  - module_qualifier_argument/1
  - module_qualifier_body/1
  - named_fun_expr/2
  - named_fun_expr_arity/1
  - named_fun_expr_clauses/1
  - named_fun_expr_name/1
  - nil/0
  - normalize_list/1
  - operator/1
  - operator_literal/1
  - operator_name/1
  - parentheses/1
  - parentheses_body/1
  - prefix_expr/2
  - prefix_expr_argument/1
  - prefix_expr_operator/1
  - receive_expr/1
  - receive_expr/3
  - receive_expr_action/1
  - receive_expr_clauses/1
  - receive_expr_timeout/1
  - record_access/3
  - record_access_argument/1
  - record_access_field/1
  - record_access_type/1
  - record_expr/2
  - record_expr/3
  - record_expr_argument/1
  - record_expr_fields/1
  - record_expr_type/1
  - record_field/1
  - record_field/2
  - record_field_name/1
  - record_field_value/1
  - record_index_expr/2
  - record_index_expr_field/1
  - record_index_expr_type/1
  - record_type/2
  - record_type_field/2
  - record_type_field_name/1
  - record_type_field_type/1
  - record_type_fields/1
  - record_type_name/1
  - remove_comments/1
  - revert/1
  - revert_forms/1
  - set_ann/2
  - set_attrs/2
  - set_pos/2
  - set_postcomments/2
  - set_precomments/2
  - size_qualifier/2
  - size_qualifier_argument/1
  - size_qualifier_body/1
  - string/1
  - string_literal/1
  - string_literal/2
  - string_value/1
  - subtrees/1
  - text/1
  - text_string/1
  - tree/1
  - tree/2
  - try_after_expr/2
  - try_expr/2
  - try_expr/3
  - try_expr/4
  - try_expr_after/1
  - try_expr_body/1
  - try_expr_clauses/1
  - try_expr_handlers/1
  - tuple/1
  - tuple_elements/1
  - tuple_size/1
  - tuple_type/0
  - tuple_type/1
  - tuple_type_elements/1
  - type/1
  - type_application/2
  - type_application/3
  - type_application_arguments/1
  - type_application_name/1
  - type_union/1
  - type_union_types/1
  - typed_record_field/2
  - typed_record_field_body/1
  - typed_record_field_type/1
  - underscore/0
  - update_tree/2
  - user_type_application/2
  - user_type_application_arguments/1
  - user_type_application_name/1
  - variable/1
  - variable_literal/1
  - variable_name/1
  - warning_marker/1
  - warning_marker_info/1
- erl_syntax_lib
  - Top of manual page
  - analyze_application/1
  - analyze_attribute/1
  - analyze_export_attribute/1
  - analyze_file_attribute/1
  - analyze_form/1
  - analyze_forms/1
  - analyze_function/1
  - analyze_function_name/1
  - analyze_implicit_fun/1
  - analyze_import_attribute/1
  - analyze_module_attribute/1
  - analyze_record_attribute/1
  - analyze_record_expr/1
  - analyze_record_field/1
  - analyze_type_application/1
  - analyze_type_name/1
  - analyze_wild_attribute/1
  - annotate_bindings/1
  - annotate_bindings/2
  - fold/3
  - fold_subtrees/3
  - foldl_listlist/3
  - function_name_expansions/1
  - is_fail_expr/1
  - limit/2
  - limit/3
  - map/2
  - map_subtrees/2
  - mapfold/3
  - mapfold_subtrees/3
  - mapfoldl_listlist/3
  - new_variable_name/1
  - new_variable_name/2
  - new_variable_names/2
  - new_variable_names/3
  - strip_comments/1
  - to_comment/1
  - to_comment/2
  - to_comment/3
  - variables/1
- erl_tidy
  - Top of manual page
  - dir/0
  - dir/1
  - dir/2
  - file/1
  - file/2
  - module/1
  - module/2
- igor
  - Top of manual page
  - create_stubs/2
  - merge/2
  - merge/3
  - merge_files/3
  - merge_files/4
  - merge_sources/3
  - parse_transform/2
  - rename/2
  - rename/3
- merl
  - Top of manual page
  - alpha/2
  - compile/1
  - compile/2
  - compile_and_load/1
  - compile_and_load/2
  - match/2
  - meta_template/1
  - print/1
  - qquote/2
  - qquote/3
  - quote/1
  - quote/2
  - show/1
  - subst/2
  - switch/2
  - template/1
  - template_vars/1
  - term/1
  - tree/1
  - tsubst/2
  - var/1
- merl_transform
  - Top of manual page
  - parse_transform/2
- prettypr
  - Top of manual page
  - above/2
  - beside/2
  - best/3
  - break/1
  - empty/0
  - floating/1
  - floating/3
  - follow/2
  - follow/3
  - format/1
  - format/2
  - format/3
  - nest/2
  - null_text/1
  - par/1
  - par/2
  - sep/1
  - text/1
  - text_par/1
  - text_par/2

# erl_comment_scan

### Module

erl_comment_scan

### Module Summary

Functions for reading comment lines from Erlang source code.

### Description

Functions for reading comment lines from Erlang source code.

### DATA TYPES

comment() = {Line::integer(), Column::integer(), Indentation::integer(), Text::[string()]}

### Exports

file(FileName::file:filename()) -> [Comment]

### Types

Comment = {Line, Column, Indentation, Text}
Line = integer()
Column = integer()
Indentation = integer()
Text = [string()]

Extracts comments from an Erlang source code file. Returns a list of entries representing multi-line comments, listed in order of increasing line-numbers. For each entry, Text is a list of strings representing the consecutive comment lines in top-down order; the strings contain all characters following (but not including) the first comment-introducing % character on the line, up to (but not including) the line-terminating newline.

Furthermore, Line is the line number and Column the left column of the comment (i.e., the column of the comment-introducing % character). Indent is the indentation (or padding), measured in character positions between the last non-whitespace character before the comment (or the left margin), and the left column of the comment. Line and Column are always positive integers, and Indentation is a nonnegative integer.

Evaluation exits with reason {read, Reason} if a read error occurred, where Reason is an atom corresponding to a Posix error code; see the module file(3) for details.

join_lines(Lines::[CommentLine]) -> [Comment]

### Types

CommentLine = {Line, Column, Indent, string()}
Line = integer()
Column = integer()
Indent = integer()
Comment = {Line, Column, Indent, Text}
Text = [string()]

Joins individual comment lines into multi-line comments. The input is a list of entries representing individual comment lines, in order of decreasing line-numbers; see scan_lines/1 for details. The result is a list of entries representing multi-line comments, still listed in order of decreasing line-numbers, but where for each entry, Text is a list of consecutive comment lines in order of increasing line-numbers (i.e., top-down).

See also: scan_lines/1.

scan_lines(Text::string()) -> [CommentLine]

### Types

CommentLine = {Line, Column, Indent, Text}
Line = integer()
Column = integer()
Indent = integer()
Text = string()

Extracts individual comment lines from a source code string. Returns a list of comment lines found in the text, listed in order of decreasing line-numbers, i.e., the last comment line in the input is first in the resulting list. Text is a single string, containing all characters following (but not including) the first comment-introducing % character on the line, up to (but not including) the line-terminating newline. For details on Line, Column and Indent, see file/1.

string(Text::string()) -> [Comment]

### Types

Comment = {Line, Column, Indentation, Text}
Line = integer()
Column = integer()
Indentation = integer()
Text = [string()]

Extracts comments from a string containing Erlang source code. Except for reading directly from a string, the behaviour is the same as for file/1.

See also: file/1.

Richard Carlsson carlsson.richard@gmail.com